/* ============================================
   RDSGN.RU — ДИЗАЙН-СИСТЕМА
   Версия: 2.5
   Тренды 2026–2027
   ============================================ */

/* ============================================
   1. ПЕРЕМЕННЫЕ (5 ТЕМ)
   ============================================ */

:root {
    /* ----- СВЕТЛАЯ ТЕМА (по умолчанию) ----- */
    --color-bg: #F0F2F5;
    --color-bg-surface: rgba(255, 255, 255, 0.7);
    --color-bg-card: rgba(255, 255, 255, 0.5);
    --color-bg-input: rgba(255, 255, 255, 0.8);
    --color-bg-hover: rgba(0, 135, 90, 0.03);
    
    --color-text-primary: #0A0E1A;
    --color-text-secondary: #2E3A4A;
    --color-text-muted: #7A8A9E;
    --color-text-inverse: #FFFFFF;
    
    --color-accent-1: #00875A;
    --color-accent-2: #0066CC;
    --color-accent-grad: linear-gradient(135deg, #00875A, #0066CC);
    --color-accent-hover: rgba(0, 135, 90, 0.15);
    --color-accent-active: rgba(0, 135, 90, 0.25);
    
    --color-border: rgba(0, 0, 0, 0.06);
    --color-border-hover: rgba(0, 135, 90, 0.2);
    --color-border-focus: rgba(0, 135, 90, 0.4);
    
    --color-shadow: rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 60px rgba(0, 135, 90, 0.04);
    --shadow-card: 0 20px 60px rgba(0, 0, 0, 0.04);
    --shadow-btn: 0 0 40px rgba(0, 135, 90, 0.08);
    --shadow-focus: 0 0 0 4px rgba(0, 135, 90, 0.06);
    
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 12px;
    --radius-xs: 10px;
    --radius-round: 50%;
    
    --space-xxs: 4px;
    --space-xs: 6px;
    --space-sm: 8px;
    --space-md: 12px;
    --space-lg: 16px;
    --space-xl: 24px;
    --space-xxl: 32px;
    --space-xxxl: 48px;
    --space-xxxxl: 64px;
}

[data-theme="dark"] {
    --color-bg: #05050A;
    --color-bg-surface: rgba(12, 16, 28, 0.6);
    --color-bg-card: rgba(255, 255, 255, 0.03);
    --color-bg-input: rgba(255, 255, 255, 0.04);
    --color-bg-hover: rgba(0, 245, 160, 0.04);
    
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #A0B0C8;
    --color-text-muted: #5A6A85;
    --color-text-inverse: #0A0E1A;
    
    --color-accent-1: #00F5A0;
    --color-accent-2: #00D4FF;
    --color-accent-grad: linear-gradient(135deg, #00F5A0, #00D4FF);
    --color-accent-hover: rgba(0, 245, 160, 0.2);
    --color-accent-active: rgba(0, 245, 160, 0.3);
    
    --color-border: rgba(255, 255, 255, 0.06);
    --color-border-hover: rgba(0, 245, 160, 0.25);
    --color-border-focus: rgba(0, 245, 160, 0.5);
    
    --color-shadow: rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 60px rgba(0, 245, 160, 0.06);
    --shadow-card: 0 20px 60px rgba(0, 0, 0, 0.25);
    --shadow-btn: 0 0 40px rgba(0, 245, 160, 0.1);
    --shadow-focus: 0 0 0 4px rgba(0, 245, 160, 0.08);
}

[data-theme="monochrome"] {
    --color-bg: #111111;
    --color-bg-surface: rgba(30, 30, 30, 0.7);
    --color-bg-card: rgba(255, 255, 255, 0.02);
    --color-bg-input: rgba(255, 255, 255, 0.03);
    --color-bg-hover: rgba(255, 255, 255, 0.02);
    
    --color-text-primary: #F0F0F0;
    --color-text-secondary: #AAAAAA;
    --color-text-muted: #666666;
    --color-text-inverse: #FFFFFF;
    
    --color-accent-1: #CCCCCC;
    --color-accent-2: #999999;
    --color-accent-grad: linear-gradient(135deg, #CCCCCC, #999999);
    --color-accent-hover: rgba(200, 200, 200, 0.2);
    --color-accent-active: rgba(200, 200, 200, 0.3);
    
    --color-border: rgba(255, 255, 255, 0.05);
    --color-border-hover: rgba(200, 200, 200, 0.2);
    --color-border-focus: rgba(200, 200, 200, 0.4);
    
    --color-shadow: rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 60px rgba(255, 255, 255, 0.02);
    --shadow-card: 0 20px 60px rgba(0, 0, 0, 0.4);
    --shadow-btn: 0 0 40px rgba(255, 255, 255, 0.03);
    --shadow-focus: 0 0 0 4px rgba(200, 200, 200, 0.06);
}

[data-theme="neon"] {
    --color-bg: #0A0015;
    --color-bg-surface: rgba(20, 0, 40, 0.7);
    --color-bg-card: rgba(255, 0, 255, 0.04);
    --color-bg-input: rgba(255, 0, 255, 0.03);
    --color-bg-hover: rgba(255, 0, 255, 0.06);
    
    --color-text-primary: #F0E6FF;
    --color-text-secondary: #C4A8E6;
    --color-text-muted: #7A5A99;
    --color-text-inverse: #0A0015;
    
    --color-accent-1: #FF00FF;
    --color-accent-2: #00FFFF;
    --color-accent-grad: linear-gradient(135deg, #FF00FF, #00FFFF);
    --color-accent-hover: rgba(255, 0, 255, 0.2);
    --color-accent-active: rgba(255, 0, 255, 0.3);
    
    --color-border: rgba(255, 0, 255, 0.1);
    --color-border-hover: rgba(255, 0, 255, 0.3);
    --color-border-focus: rgba(255, 0, 255, 0.5);
    
    --color-shadow: rgba(255, 0, 255, 0.1);
    --shadow-glow: 0 0 60px rgba(255, 0, 255, 0.08);
    --shadow-card: 0 20px 60px rgba(255, 0, 255, 0.06);
    --shadow-btn: 0 0 40px rgba(255, 0, 255, 0.15);
    --shadow-focus: 0 0 0 4px rgba(255, 0, 255, 0.08);
}

[data-theme="lime"] {
    --color-bg: #0A1A00;
    --color-bg-surface: rgba(20, 40, 0, 0.7);
    --color-bg-card: rgba(0, 255, 0, 0.03);
    --color-bg-input: rgba(0, 255, 0, 0.03);
    --color-bg-hover: rgba(0, 255, 0, 0.04);
    
    --color-text-primary: #E6FFE6;
    --color-text-secondary: #A8D6A8;
    --color-text-muted: #5A8A5A;
    --color-text-inverse: #0A1A00;
    
    --color-accent-1: #00FF33;
    --color-accent-2: #66FF99;
    --color-accent-grad: linear-gradient(135deg, #00FF33, #66FF99);
    --color-accent-hover: rgba(0, 255, 0, 0.15);
    --color-accent-active: rgba(0, 255, 0, 0.25);
    
    --color-border: rgba(0, 255, 0, 0.08);
    --color-border-hover: rgba(0, 255, 0, 0.25);
    --color-border-focus: rgba(0, 255, 0, 0.4);
    
    --color-shadow: rgba(0, 255, 0, 0.05);
    --shadow-glow: 0 0 60px rgba(0, 255, 0, 0.06);
    --shadow-card: 0 20px 60px rgba(0, 255, 0, 0.04);
    --shadow-btn: 0 0 40px rgba(0, 255, 0, 0.12);
    --shadow-focus: 0 0 0 4px rgba(0, 255, 0, 0.06);
}

/* ============================================
   2. БАЗОВЫЕ СТИЛИ
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: 400;
    line-height: 1.6;
    background: var(--color-bg);
    color: var(--color-text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background 0.7s cubic-bezier(0.22, 1, 0.36, 1),
                color 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

::-webkit-scrollbar {
    width: 4px;
    height: 4px;
}
::-webkit-scrollbar-track {
    background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
    background: var(--color-accent-1);
    border-radius: 2px;
    opacity: 0.3;
}
::-webkit-scrollbar-thumb:hover {
    opacity: 1;
}

::selection {
    background: var(--color-accent-1);
    color: var(--color-text-inverse);
}

:focus-visible {
    outline: 2px solid var(--color-accent-1);
    outline-offset: 2px;
    border-radius: 4px;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-accent-2);
    text-decoration: none;
    transition: color 0.3s ease;
}
a:hover {
    color: var(--color-accent-1);
}

/* ============================================
   3. КОНТЕЙНЕР
   ============================================ */

.container {
    max-width: 1200px;
    width: 92%;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}
@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-xxl);
    }
}
@media (min-width: 1200px) {
    .container {
        padding: 0 var(--space-xxxl);
    }
}

/* ============================================
   4. ХЕДЕР
   ============================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--space-sm) 0;
    background: var(--color-bg-surface);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--color-border);
    transition: padding 0.4s cubic-bezier(0.22, 1, 0.36, 1),
                background 0.7s cubic-bezier(0.22, 1, 0.36, 1),
                box-shadow 0.4s ease;
}

.header-scrolled {
    padding: var(--space-xs) 0;
    box-shadow: 0 4px 40px var(--color-shadow);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    width: 92%;
    margin: 0 auto;
}

/* Логотип в хедере */
.logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xxs);
    transition: transform 0.3s ease;
    text-decoration: none;
}
.logo:hover {
    transform: scale(1.01);
}

.logo-main {
    font-size: clamp(1.1rem, 1.3vw, 1.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    background: var(--color-accent-grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1.1;
}

.logo-typing {
    font-size: clamp(0.65rem, 0.7vw, 0.8rem);
    font-weight: 400;
    color: var(--color-text-secondary);
    border-right: 1.5px solid var(--color-accent-1);
    padding-right: 3px;
    animation: blink 0.8s step-end infinite;
    white-space: nowrap;
    min-height: 1.2em;
    display: inline-block;
    letter-spacing: 0.01em;
}

@keyframes blink {
    0%, 100% { border-color: var(--color-accent-1); }
    50% { border-color: transparent; }
}

.themes {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

.theme-btn {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-round);
    border: 1.5px solid var(--color-border);
    background: var(--color-bg-card);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
    padding: 0;
}
.theme-btn:hover {
    transform: scale(1.1);
    border-color: var(--color-accent-1);
}
.theme-btn.active {
    border-color: var(--color-accent-1);
    box-shadow: 0 0 20px var(--color-accent-1);
}
.theme-btn svg {
    width: 16px;
    height: 16px;
    fill: none;
    stroke: var(--color-text-secondary);
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: stroke 0.3s ease;
}
.theme-btn:hover svg {
    stroke: var(--color-accent-1);
}
.theme-btn.active svg {
    stroke: var(--color-accent-1);
}

@media (max-width: 480px) {
    .theme-btn {
        width: 28px;
        height: 28px;
    }
    .theme-btn svg {
        width: 14px;
        height: 14px;
    }
    .logo-main {
        font-size: 0.95rem;
    }
    .logo-typing {
        font-size: 0.55rem;
    }
}

/* ============================================
   5. ОСНОВНОЙ КОНТЕЙНЕР (С УЧЁТОМ ХЕДЕРА)
   ============================================ */

.main {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 130px 0 var(--space-xxxxl);
    position: relative;
    overflow: hidden;
}

@media (max-width: 768px) {
    .main {
        padding: 110px 0 var(--space-xxxl);
    }
}
@media (max-width: 480px) {
    .main {
        padding: 100px 0 var(--space-xxl);
    }
}

/* Фоновые эффекты */
.main::before {
    content: '';
    position: absolute;
    width: 80vw;
    height: 80vw;
    top: -30%;
    right: -20%;
    background: radial-gradient(circle, var(--color-accent-1) 0%, transparent 70%);
    opacity: 0.03;
    border-radius: 50%;
    pointer-events: none;
    filter: blur(100px);
    animation: floatBg 25s ease-in-out infinite alternate;
    transition: background 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.main::after {
    content: '';
    position: absolute;
    width: 60vw;
    height: 60vw;
    bottom: -30%;
    left: -20%;
    background: radial-gradient(circle, var(--color-accent-2) 0%, transparent 70%);
    opacity: 0.02;
    border-radius: 50%;
    pointer-events: none;
    filter: blur(100px);
    animation: floatBg 30s ease-in-out infinite alternate-reverse;
    transition: background 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes floatBg {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(40px, -40px) scale(1.1); }
}

.main-content {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 820px;
    margin: 0 auto;
}

/* ============================================
   6. ФУТЕР
   ============================================ */

.footer {
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
    background: var(--color-bg-surface);
    backdrop-filter: blur(12px);
}

/* Десктоп: футер закреплён внизу */
@media (min-width: 769px) {
    .footer {
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        z-index: 999;
        padding: var(--space-md) 0;
    }
    .main {
        padding-bottom: 130px;
    }
}

/* Мобилка: футер не закреплён */
@media (max-width: 768px) {
    .footer {
        position: relative;
        padding: var(--space-lg) 0;
    }
    .main {
        padding-bottom: var(--space-xxxl);
    }
}

.footer-text {
    font-size: clamp(0.75rem, 0.8vw, 0.85rem);
    color: var(--color-text-muted);
    line-height: 1.8;
}
.footer-text a {
    color: var(--color-accent-2);
    transition: color 0.3s ease;
}
.footer-text a:hover {
    color: var(--color-accent-1);
}
.footer-divider {
    display: inline-block;
    margin: 0 var(--space-xs);
    color: var(--color-text-muted);
    opacity: 0.2;
}

/* ============================================
   7. ЭКРАНЫ (STEPPER)
   ============================================ */

.screen {
    display: none;
    animation: screenIn 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    will-change: transform, opacity;
}
.screen.active {
    display: block;
}

@keyframes screenIn {
    0% { opacity: 0; transform: translateY(20px); }
    100% { opacity: 1; transform: translateY(0); }
}

/* ============================================
   8. ЭКРАН 1 — ХИРО
   ============================================ */

.hero-title {
    font-size: clamp(2.2rem, 5vw, 4.8rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.05;
    margin-bottom: var(--space-xl);
    color: var(--color-text-primary);
}
.hero-title .highlight {
    background: var(--color-accent-grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-typing-wrapper {
    min-height: 2.4rem;
    margin-bottom: var(--space-xl);
}
.hero-typing {
    font-size: clamp(0.95rem, 1.2vw, 1.25rem);
    font-weight: 500;
    color: var(--color-text-secondary);
    border-right: 2px solid var(--color-accent-1);
    padding-right: 4px;
    animation: blink 0.8s step-end infinite;
}

.hero-sub {
    font-size: clamp(1rem, 1.1vw, 1.2rem);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xxxl);
    font-weight: 400;
}

/* ============================================
   9. ФОРМА
   ============================================ */

.form-wrapper {
    max-width: 540px;
    margin: 0 auto;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.field-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.field-label {
    font-size: clamp(0.8rem, 0.85vw, 0.9rem);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.input-wrapper {
    display: flex;
    align-items: flex-start;
    background: var(--color-bg-input);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
    position: relative;
}
.input-wrapper:focus-within {
    border-color: var(--color-accent-1);
    box-shadow: var(--shadow-focus);
}
.input-wrapper.error {
    border-color: #e5484d;
    box-shadow: 0 0 0 4px rgba(229, 72, 77, 0.06);
    animation: shake 0.5s ease;
}
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

.input-icon {
    padding: 0 0 0 var(--space-lg);
    color: var(--color-text-muted);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 54px;
    transition: color 0.3s ease;
}
.input-wrapper:focus-within .input-icon {
    color: var(--color-accent-1);
}
.input-icon svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    fill: none;
}

.input-wrapper input,
.input-wrapper textarea {
    flex: 1;
    background: transparent;
    border: none;
    padding: var(--space-md) var(--space-lg);
    font-size: clamp(0.95rem, 1vw, 1.05rem);
    font-weight: 400;
    font-family: inherit;
    color: var(--color-text-primary);
    outline: none;
    min-height: 54px;
    resize: vertical;
    width: 100%;
}
.input-wrapper textarea {
    min-height: 80px;
    max-height: 200px;
    padding: var(--space-md) var(--space-lg);
}
.input-wrapper input::placeholder,
.input-wrapper textarea::placeholder {
    color: var(--color-text-muted);
    font-weight: 400;
}

@media (max-width: 480px) {
    .input-icon {
        min-height: 48px;
        padding-left: var(--space-md);
    }
    .input-icon svg {
        width: 17px;
        height: 17px;
    }
    .input-wrapper input,
    .input-wrapper textarea {
        padding: var(--space-sm) var(--space-md);
        min-height: 48px;
        font-size: 0.95rem;
    }
    .input-wrapper textarea {
        min-height: 60px;
    }
}

/* Автозаполнение */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
input:-webkit-autofill:active,
textarea:-webkit-autofill {
    -webkit-box-shadow: 0 0 0 1000px var(--color-bg-input) inset !important;
    -webkit-text-fill-color: var(--color-text-primary) !important;
    background-color: transparent !important;
}

.field-hint {
    font-size: clamp(0.7rem, 0.75vw, 0.8rem);
    color: var(--color-text-muted);
    padding-left: var(--space-xxs);
}
.field-error {
    display: none;
    font-size: clamp(0.7rem, 0.75vw, 0.8rem);
    color: #e5484d;
    padding-left: var(--space-xxs);
    font-weight: 500;
}
.field-error.show {
    display: block;
}

.form-hint {
    font-size: clamp(0.85rem, 0.9vw, 0.95rem);
    color: var(--color-text-secondary);
    text-align: center;
}

.link-error {
    display: none;
    font-size: clamp(0.7rem, 0.75vw, 0.8rem);
    color: #e5484d;
    padding-left: var(--space-xxs);
    font-weight: 500;
    text-align: left;
}
.link-error.show {
    display: block;
}

/* ============================================
   10. КНОПКИ
   ============================================ */

.btn {
    padding: var(--space-md) var(--space-xl);
    font-size: clamp(0.9rem, 0.95vw, 1rem);
    font-weight: 600;
    font-family: inherit;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
    min-height: 54px;
    width: 100%;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.01em;
}

@media (max-width: 480px) {
    .btn {
        min-height: 48px;
        padding: var(--space-sm) var(--space-lg);
        font-size: 0.9rem;
    }
}

.btn-primary {
    background: var(--color-accent-grad);
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-btn);
}
.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(-100%);
    transition: transform 0.5s ease;
}
.btn-primary:hover::before {
    transform: translateX(0);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 40px var(--color-accent-1);
}
.btn-primary:active {
    transform: scale(0.97);
}
.btn-primary:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none !important;
}
.btn-primary .btn-text {
    position: relative;
    z-index: 1;
}
.btn-primary.loading .btn-text {
    opacity: 0;
}
.btn-primary.loading::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 24px;
    border: 2.5px solid rgba(255, 255, 255, 0.15);
    border-top-color: var(--color-text-inverse);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    z-index: 2;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

.btn-primary.success {
    animation: none;
}
.btn-primary.success .btn-text {
    opacity: 1;
}
.btn-primary.success::after {
    content: '✓';
    position: absolute;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-text-inverse);
    z-index: 2;
    animation: checkPop 0.4s ease;
}
@keyframes checkPop {
    0% { transform: scale(0); opacity: 0; }
    80% { transform: scale(1.3); }
    100% { transform: scale(1); opacity: 1; }
}

.btn-secondary {
    background: var(--color-bg-card);
    color: var(--color-text-secondary);
    border: 1.5px solid var(--color-border);
    box-shadow: none;
}
.btn-secondary:hover {
    border-color: var(--color-accent-1);
    color: var(--color-accent-1);
    transform: translateY(-2px);
}
.btn-secondary:active {
    transform: scale(0.97);
}

.btn-nav {
    padding: var(--space-sm) var(--space-xl);
    font-size: clamp(0.8rem, 0.85vw, 0.9rem);
    font-weight: 500;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-xs);
    background: var(--color-bg-card);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
    min-height: 44px;
    font-family: inherit;
    width: auto;
}
.btn-nav:hover {
    border-color: var(--color-accent-1);
    color: var(--color-accent-1);
    transform: translateY(-1px);
}
.btn-nav:active {
    transform: scale(0.96);
}

.btn-nav-primary {
    background: var(--color-accent-grad);
    color: var(--color-text-inverse);
    border: none;
}
.btn-nav-primary:hover {
    border: none;
    color: var(--color-text-inverse);
}

.nav-group {
    display: flex;
    justify-content: space-between;
    gap: var(--space-lg);
    margin-top: var(--space-xxxl);
}
.nav-group .btn-nav {
    flex: 1;
    max-width: 200px;
}

@media (max-width: 480px) {
    .nav-group .btn-nav {
        max-width: 120px;
        font-size: 0.75rem;
        padding: var(--space-xs) var(--space-md);
        min-height: 36px;
    }
}

/* ============================================
   11. КАРТОЧКИ ЗАДАЧ (STAGGER + ВАУ-ЭФФЕКТ)
   ============================================ */

.tasks-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin: var(--space-xl) 0;
}
@media (min-width: 640px) {
    .tasks-grid {
        grid-template-columns: 1fr 1fr 1fr;
        gap: var(--space-lg);
    }
}

.task-card {
    background: var(--color-bg-card);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg) var(--space-lg);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    min-height: 80px;
    opacity: 0;
    transform: translateY(30px);
    animation: cardIn 0.5s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    position: relative;
}
.task-card:nth-child(1) { animation-delay: 0.05s; }
.task-card:nth-child(2) { animation-delay: 0.10s; }
.task-card:nth-child(3) { animation-delay: 0.15s; }
.task-card:nth-child(4) { animation-delay: 0.20s; }
.task-card:nth-child(5) { animation-delay: 0.25s; }
.task-card:nth-child(6) { animation-delay: 0.30s; }

@keyframes cardIn {
    0% { opacity: 0; transform: translateY(30px); }
    100% { opacity: 1; transform: translateY(0); }
}

.task-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: var(--radius-md);
    background: var(--color-accent-grad);
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: -1;
}
.task-card:hover::before {
    opacity: 0.15;
}
.task-card.active::before {
    opacity: 0.3;
}

.task-card:hover {
    transform: translateY(-6px) scale(1.01);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-card), var(--shadow-glow);
}
.task-card.active {
    border-color: var(--color-accent-1);
    box-shadow: 0 0 0 4px var(--color-accent-1), var(--shadow-glow);
    transform: translateY(-4px) scale(1.02);
}
.task-card:active {
    transform: scale(0.97);
}

.task-card .task-icon {
    font-size: 1.2rem;
    line-height: 1;
    display: flex;
    align-items: center;
}
.task-card .task-icon svg {
    width: 32px;
    height: 32px;
    stroke: var(--color-accent-1);
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
    fill: none;
    transition: all 0.3s ease;
}
.task-card:hover .task-icon svg {
    stroke: var(--color-accent-2);
    transform: scale(1.1);
}
.task-card.active .task-icon svg {
    stroke: var(--color-accent-1);
    filter: drop-shadow(0 0 8px var(--color-accent-1));
}

.task-card .task-title {
    font-size: clamp(0.95rem, 1vw, 1.05rem);
    font-weight: 600;
    color: var(--color-text-primary);
}
.task-card .task-desc {
    font-size: clamp(0.7rem, 0.75vw, 0.8rem);
    color: var(--color-text-muted);
    line-height: 1.3;
}

.task-card .task-input {
    margin-top: var(--space-xs);
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xs);
    background: var(--color-bg-input);
    color: var(--color-text-primary);
    font-size: clamp(0.85rem, 0.9vw, 0.95rem);
    font-family: inherit;
    outline: none;
    transition: border 0.3s ease;
    display: none;
}
.task-card .task-input:focus {
    border-color: var(--color-accent-1);
}
.task-card .task-input.show {
    display: block;
}

@media (max-width: 480px) {
    .task-card {
        padding: var(--space-sm) var(--space-md);
        min-height: 60px;
        border-radius: var(--radius-xs);
        animation-delay: 0s !important;
        opacity: 1;
        transform: none;
    }
    .task-card .task-icon svg {
        width: 24px;
        height: 24px;
    }
    .task-card .task-title {
        font-size: 0.85rem;
    }
    .task-card .task-desc {
        font-size: 0.65rem;
    }
}

/* ============================================
   12. ЧЕКБОКС
   ============================================ */

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    cursor: pointer;
    padding: var(--space-xxs) 0;
}
.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    min-width: 18px;
    margin-top: 2px;
    cursor: pointer;
    background: var(--color-bg-input);
    border: 1.5px solid var(--color-border);
    border-radius: 5px;
    appearance: none;
    -webkit-appearance: none;
    transition: all 0.3s ease;
    position: relative;
}
.checkbox-group input[type="checkbox"]:checked {
    background: var(--color-accent-1);
    border-color: var(--color-accent-1);
}
.checkbox-group input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 5px;
    width: 6px;
    height: 10px;
    border-right: 2px solid var(--color-text-inverse);
    border-bottom: 2px solid var(--color-text-inverse);
    transform: rotate(45deg);
}
.checkbox-group label {
    font-size: clamp(0.85rem, 0.9vw, 0.95rem);
    color: var(--color-text-secondary);
    cursor: pointer;
    line-height: 1.4;
}
.checkbox-group label a {
    color: var(--color-accent-2);
    font-weight: 500;
}
.checkbox-group label a:hover {
    color: var(--color-accent-1);
}
.checkbox-group.error input[type="checkbox"] {
    border-color: #e5484d;
    box-shadow: 0 0 0 4px rgba(229, 72, 77, 0.06);
}
.checkbox-error {
    display: none;
    font-size: clamp(0.7rem, 0.75vw, 0.8rem);
    color: #e5484d;
    padding-left: var(--space-xxs);
    font-weight: 500;
}
.checkbox-error.show {
    display: block;
}

/* ============================================
   13. СООБЩЕНИЯ
   ============================================ */

.msg-success {
    display: none;
    padding: var(--space-lg) var(--space-xl);
    border-radius: var(--radius-sm);
    background: rgba(0, 245, 160, 0.06);
    border: 1px solid rgba(0, 245, 160, 0.15);
    color: var(--color-accent-1);
    text-align: center;
    font-weight: 500;
    font-size: clamp(0.9rem, 0.95vw, 1rem);
    animation: fadeSlide 0.5s ease;
}
.msg-success.show {
    display: block;
}
.msg-error {
    display: none;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-sm);
    background: rgba(229, 72, 77, 0.06);
    border: 1px solid rgba(229, 72, 77, 0.15);
    color: #e5484d;
    text-align: center;
    font-size: clamp(0.85rem, 0.9vw, 0.95rem);
    font-weight: 500;
}
.msg-error.show {
    display: block;
}
@keyframes fadeSlide {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   14. ФИЧИ (ПОДПИСИ ПОД КНОПКОЙ)
   ============================================ */

.features-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}
.feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    font-size: clamp(0.8rem, 0.85vw, 0.9rem);
    color: var(--color-text-secondary);
    text-align: left;
}
.feature-item svg {
    width: 18px;
    height: 18px;
    min-width: 18px;
    stroke: var(--color-accent-1);
    stroke-width: 2.5;
    fill: none;
    margin-top: 2px;
}
.feature-item span {
    line-height: 1.4;
}

/* ============================================
   15. ЭКРАН 4 — ФИНАЛ
   ============================================ */

.screen-title {
    font-size: clamp(1.6rem, 2.5vw, 2.8rem);
    font-weight: 700;
    color: var(--color-text-primary);
    text-align: center;
    margin-bottom: var(--space-xs);
    line-height: 1.15;
}
.screen-sub {
    font-size: clamp(0.95rem, 1vw, 1.1rem);
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: var(--space-xl);
}

.final-steps {
    list-style: none;
    padding: 0;
    margin: var(--space-xl) 0;
    counter-reset: step;
}
.final-steps li {
    padding: var(--space-sm) 0 var(--space-sm) calc(var(--space-xxxl) + var(--space-sm));
    font-size: clamp(0.95rem, 1vw, 1.05rem);
    color: var(--color-text-secondary);
    position: relative;
    counter-increment: step;
    border-bottom: 1px solid var(--color-border);
    line-height: 1.5;
}
.final-steps li:last-child {
    border-bottom: none;
}
.final-steps li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    top: var(--space-sm);
    width: 28px;
    height: 28px;
    border-radius: var(--radius-round);
    background: var(--color-accent-grad);
    color: var(--color-text-inverse);
    font-size: clamp(0.7rem, 0.75vw, 0.8rem);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.final-divider {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--space-xl) 0;
}

.final-pricing {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-xl) var(--space-xxl);
    margin: var(--space-xl) 0;
}
.final-pricing .pricing-title {
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
    font-size: clamp(0.95rem, 1vw, 1.05rem);
}
.final-pricing .pricing-item {
    display: flex;
    justify-content: space-between;
    padding: var(--space-xs) 0;
    font-size: clamp(0.9rem, 0.95vw, 1rem);
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
}
.final-pricing .pricing-item:last-child {
    border-bottom: none;
}
.final-pricing .pricing-item .price {
    font-weight: 700;
    color: var(--color-text-primary);
    font-size: clamp(1.1rem, 1.2vw, 1.3rem);
}

.final-sub {
    text-align: center;
    font-size: clamp(0.95rem, 1vw, 1.05rem);
    color: var(--color-text-secondary);
    margin: var(--space-xl) 0;
}

.final-project-id {
    text-align: center;
    padding: var(--space-lg) var(--space-xl);
    margin: var(--space-xl) 0;
    background: var(--color-bg-card);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-sm);
    font-size: clamp(1rem, 1.1vw, 1.2rem);
    font-weight: 600;
    color: var(--color-text-primary);
}
.final-project-id span {
    color: var(--color-accent-1);
}

@media (max-width: 480px) {
    .final-pricing {
        padding: var(--space-lg);
    }
    .final-project-id {
        font-size: 1rem;
        padding: var(--space-sm) var(--space-lg);
    }
    .final-steps li {
        padding-left: calc(var(--space-xl) + var(--space-sm));
    }
    .final-steps li::before {
        width: 22px;
        height: 22px;
        font-size: 0.65rem;
    }
}

/* ============================================
   16. АДАПТИВ
   ============================================ */

@media (max-width: 767px) {
    .main {
        padding: 110px 0 var(--space-xxxl);
    }
    .tasks-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-sm);
    }
    .hero-title {
        margin-bottom: var(--space-xl);
    }
    .hero-sub {
        margin-bottom: var(--space-xl);
    }
    .nav-group {
        gap: var(--space-sm);
    }
}

@media (max-width: 480px) {
    .main {
        padding: 100px 0 var(--space-xxl);
    }
    .tasks-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-xs);
    }
    .hero-title {
        font-size: 2rem;
        margin-bottom: var(--space-lg);
    }
    .hero-sub {
        font-size: 0.95rem;
        margin-bottom: var(--space-xl);
    }
    .hero-typing-wrapper {
        min-height: 1.8rem;
        margin-bottom: var(--space-lg);
    }
    .nav-group {
        gap: var(--space-sm);
    }
}

/* ============================================
   17. ДОСТУПНОСТЬ (a11y)
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .screen {
        animation: none !important;
    }
    .task-card {
        opacity: 1 !important;
        transform: none !important;
        animation: none !important;
    }
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ============================================
   18. COOKIE-БАННЕР
   ============================================ */

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 9999;
    background: var(--color-bg-surface);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--color-border);
    padding: var(--space-lg) var(--space-xl);
    box-shadow: 0 -8px 40px var(--color-shadow);
    animation: slideUp 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
@keyframes slideUp {
    from { transform: translateY(100%); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}
.cookie-banner-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-xl);
    flex-wrap: wrap;
}
.cookie-text {
    font-size: clamp(0.8rem, 0.85vw, 0.9rem);
    color: var(--color-text-secondary);
    margin: 0;
    flex: 1;
}
.cookie-text a {
    color: var(--color-accent-2);
    font-weight: 500;
    text-decoration: underline;
}
.cookie-text a:hover {
    color: var(--color-accent-1);
}
.cookie-btn {
    padding: var(--space-sm) var(--space-xl);
    border: none;
    border-radius: var(--radius-xs);
    background: var(--color-accent-grad);
    color: var(--color-text-inverse);
    font-weight: 600;
    font-size: clamp(0.8rem, 0.85vw, 0.9rem);
    cursor: pointer;
    font-family: inherit;
    transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
    white-space: nowrap;
}
.cookie-btn:hover {
    transform: scale(1.03);
    box-shadow: 0 0 30px var(--color-accent-1);
}
@media (max-width: 640px) {
    .cookie-banner {
        padding: var(--space-sm) var(--space-lg);
    }
    .cookie-banner-inner {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-sm);
        text-align: center;
    }
    .cookie-btn {
        width: 100%;
        padding: var(--space-sm);
    }
}

/* ============================================
   19. OFFLINE
   ============================================ */

.offline-icon {
    font-size: 4rem;
    margin-bottom: var(--space-lg);
    display: block;
    background: var(--color-accent-grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.offline-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    margin-bottom: var(--space-sm);
}
.offline-text {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    font-size: clamp(1rem, 1.1vw, 1.15rem);
}
.offline-actions {
    display: flex;
    gap: var(--space-lg);
    justify-content: center;
    flex-wrap: wrap;
}
.offline-actions .btn {
    width: auto;
    min-width: 160px;
}

/* ============================================
   20. 404
   ============================================ */

.error-404 {
    text-align: center;
    padding: var(--space-xxxl) 0;
}
.error-404 .code {
    font-size: clamp(4rem, 10vw, 8rem);
    font-weight: 900;
    background: var(--color-accent-grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    line-height: 1;
}
.error-404 .message {
    font-size: clamp(1rem, 1.1vw, 1.2rem);
    color: var(--color-text-secondary);
    margin: var(--space-lg) 0 var(--space-xxl);
}