/* =========================================
   FORM.CSS - Fasty Pro Registration Form
   Based on UI_UX_GUIDELINES.md
   ========================================= */

@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@400;500;600;700;800;900&display=swap');

:root {
    /* Dark theme for Pro pages with guideline colors */
    --bg-primary: #0f1724;
    --bg-secondary: #1a2332;
    --bg-card: rgba(255, 255, 255, 0.04);
    --bg-card-hover: rgba(255, 255, 255, 0.08);
    --bg-input: rgba(255, 255, 255, 0.06);

    /* Brand colors from guidelines */
    --primary-orange: #F97316;
    --primary-dark: #EA580C;
    --primary-light: #FB923C;
    --secondary-gold: #F59E0B;
    --gold-light: #FBBF24;
    
    /* Glow effects */
    --accent-glow: rgba(249, 115, 22, 0.2);
    --accent-subtle: rgba(249, 115, 22, 0.1);
    --gold-glow: rgba(245, 158, 11, 0.12);

    /* Semantic colors */
    --success: #22C55E;
    --success-glow: rgba(34, 197, 94, 0.2);
    --error: #EF4444;
    --error-glow: rgba(239, 68, 68, 0.15);

    /* Text colors */
    --text-primary: #eef2ff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;

    /* Borders */
    --border: rgba(255, 255, 255, 0.1);
    --border-focus: rgba(249, 115, 22, 0.5);
    --border-error: rgba(239, 68, 68, 0.4);

    /* Typography from guidelines */
    --font-family: 'Archivo', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Spacing - 8px base grid */
    --spacing-xxs: 4px;
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;

    /* Border radius from guidelines */
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-xxl: 24px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-brand: 0 10px 24px var(--accent-glow);
    --shadow-success: 0 10px 24px var(--success-glow);
}

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

body {
    font-family: var(--font-family);
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    position: relative;
    overflow-x: hidden;
}

/* Animated gradient orbs */
body::before {
    content: '';
    position: fixed;
    top: 5%;
    right: -15%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 50%);
    pointer-events: none;
    animation: floatOrb 15s ease-in-out infinite;
    z-index: 0;
}

body::after {
    content: '';
    position: fixed;
    bottom: 10%;
    left: -20%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--gold-glow) 0%, transparent 50%);
    pointer-events: none;
    animation: floatOrb 18s ease-in-out infinite reverse;
    z-index: 0;
}

@keyframes floatOrb {
    0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.6; }
    33% { transform: translate(30px, -40px) scale(1.1); opacity: 0.8; }
    66% { transform: translate(-20px, 30px) scale(0.9); opacity: 0.5; }
}

/* =========================================
   PAGE LAYOUT
   ========================================= */
.form-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg) var(--spacing-md) 60px;
}

/* =========================================
   HEADER
   ========================================= */
.form-header {
    max-width: 560px;
    margin: 0 auto var(--spacing-xl);
    width: 100%;
}

.header-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding: 10px var(--spacing-md);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.back-link:hover {
    color: var(--text-primary);
    background: var(--bg-card-hover);
    border-color: var(--primary-orange);
}

.logo-link {
    display: flex;
    align-items: center;
}

.logo-img {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-lg);
}

.header-content {
    text-align: center;
}

.header-content h1 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--text-primary), var(--secondary-gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-content .subtitle {
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.6;
}

/* =========================================
   STEP INDICATOR
   ========================================= */
.step-indicator {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    max-width: 400px;
    margin: 0 auto var(--spacing-xl);
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    flex: 1;
    position: relative;
}

.step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 22px;
    left: calc(50% + 28px);
    width: calc(100% - 36px);
    height: 2px;
    background: var(--border);
    border-radius: 2px;
}

.step.completed:not(:last-child)::after,
.step.active:not(:last-child)::after {
    background: linear-gradient(90deg, var(--primary-orange), var(--secondary-gold));
}

.step-number {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
    background: var(--bg-card);
    border: 2px solid var(--border);
    color: var(--text-muted);
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    position: relative;
    z-index: 1;
}

.step.active .step-number,
.step.completed .step-number {
    background: linear-gradient(135deg, var(--primary-orange), var(--secondary-gold));
    border-color: transparent;
    color: white;
    box-shadow: var(--shadow-brand);
    animation: stepPop 0.4s ease-out;
}

.step.active .step-number {
    animation: stepPulse 2s ease-in-out infinite;
}

@keyframes stepPop {
    0% { transform: scale(0.8); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

@keyframes stepPulse {
    0%, 100% { box-shadow: var(--shadow-brand), 0 0 0 0 rgba(249, 115, 22, 0.3); }
    50% { box-shadow: var(--shadow-brand), 0 0 0 8px rgba(249, 115, 22, 0); }
}

.step-label {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
    transition: all 0.3s ease;
}

.step.active .step-label,
.step.completed .step-label {
    color: var(--text-primary);
}

/* =========================================
   FORM CONTAINER
   ========================================= */
.form-container {
    max-width: 560px;
    margin: 0 auto;
    width: 100%;
    flex: 1;
}

.form-card {
    background: linear-gradient(145deg, var(--bg-card), rgba(255, 255, 255, 0.02));
    border: 1px solid var(--border);
    border-radius: var(--radius-xxl);
    padding: var(--spacing-xl);
    backdrop-filter: blur(16px);
    position: relative;
    overflow: hidden;
    animation: fadeInScale 0.5s ease-out;
    z-index: 1;
}

.form-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-orange), var(--secondary-gold), var(--primary-orange));
    background-size: 200% 100%;
    animation: gradientMove 4s linear infinite;
}

@keyframes gradientMove {
    0% { background-position: 0% 0%; }
    100% { background-position: 200% 0%; }
}

@keyframes fadeInScale {
    from { opacity: 0; transform: scale(0.98) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

/* =========================================
   FORM STEPS
   ========================================= */
.form-step {
    display: none;
}

.form-step.active {
    display: block;
    animation: fadeSlide 0.4s ease-out;
}

@keyframes fadeSlide {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* =========================================
   FORM FIELDS
   ========================================= */
.field-group {
    margin-bottom: var(--spacing-lg);
}

.field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.field-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
}

.field-group label .required {
    color: var(--primary-orange);
}

.field-group input,
.field-group select,
.field-group textarea {
    width: 100%;
    padding: 14px var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border);
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    transition: all 0.3s ease;
    outline: none;
    position: relative;
}

.field-group input::placeholder,
.field-group textarea::placeholder {
    color: var(--text-muted);
    transition: opacity 0.3s ease;
}

.field-group input:focus::placeholder,
.field-group textarea:focus::placeholder {
    opacity: 0.5;
}

.field-group input:focus,
.field-group select:focus,
.field-group textarea:focus {
    border-color: var(--border-focus);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 4px var(--accent-subtle);
    transform: translateY(-1px);
}

.field-group input:not(:placeholder-shown):valid,
.field-group select:valid,
.field-group textarea:not(:placeholder-shown):valid {
    border-color: rgba(34, 197, 94, 0.3);
}

.field-group input.error,
.field-group select.error,
.field-group textarea.error {
    border-color: var(--border-error);
    background: rgba(239, 68, 68, 0.08);
}

.field-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%2371717a' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-md) center;
    padding-right: 48px;
}

.field-group select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.field-group textarea {
    resize: vertical;
    min-height: 90px;
}

/* =========================================
   PLAN SELECTOR
   ========================================= */
.plan-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.plan-option {
    position: relative;
}

.plan-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.plan-option label {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border);
    background: var(--bg-input);
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    text-align: center;
    margin: 0;
    position: relative;
}

.plan-option label::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 40px;
    transform: scaleX(0);
    transition: transform 0.3s ease;
    border-top: 2px solid var(--primary-orange);
    border-radius: var(--radius-lg) var(--radius-lg);
}

.plan-option label:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(249, 115, 22, 0.3);
    transform: translateY(-2px);
}

.plan-option label:hover::before {
    transform: scaleX(0.5);
}

.plan-option input:checked + label {
    background: var(--accent-subtle);
    border-color: var(--primary-orange);
    box-shadow: var(--shadow-brand);
    transform: translateY(-2px);
}

.plan-option input:checked + label::before {
    transform: scaleX(1);
}

.plan-option .plan-name {
    font-weight: 700;
    font-size: 16px;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.plan-option .plan-desc {
    font-size: 13px;
    color: var(--text-muted);
}

/* Popular badge - using ::after to avoid conflict with accent bar */
.plan-option.popular label::after {
    content: 'Populaire';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary-orange), var(--secondary-gold));
    color: white;
    font-size: 10px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    z-index: 10;
    white-space: nowrap;
    box-shadow: 0 4px 12px var(--accent-glow);
}

/* =========================================
   BUTTONS
   ========================================= */
.form-actions {
    margin-top: var(--spacing-xl);
}

.form-actions.dual {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-sm);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-orange), var(--primary-light));
    color: white;
    box-shadow: var(--shadow-brand);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: translateX(-100%);
    transition: transform 0.5s ease;
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 14px 36px var(--accent-glow);
}

.btn-primary:hover::before {
    transform: translateX(100%);
}

.btn-primary:active {
    transform: translateY(-1px) scale(1.01);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary:disabled::before {
    display: none;
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 2px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* =========================================
   SUCCESS STATE
   ========================================= */
.success-box {
    display: none;
    text-align: center;
    padding: var(--spacing-xxl) var(--spacing-lg);
}

.success-box.visible {
    display: block;
    animation: scaleIn 0.5s ease-out;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.success-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--success), #16a34a);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    box-shadow: var(--shadow-success);
    position: relative;
    animation: successPop 0.6s ease-out;
}

.success-icon::before {
    content: '';
    position: absolute;
    inset: -8px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--success), #16a34a);
    opacity: 0.2;
    animation: successRing 1.5s ease-out infinite;
}

@keyframes successPop {
    0% { transform: scale(0); opacity: 0; }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); opacity: 1; }
}

@keyframes successRing {
    0% { transform: scale(1); opacity: 0.3; }
    100% { transform: scale(1.5); opacity: 0; }
}

.success-icon svg {
    width: 40px;
    height: 40px;
    color: white;
    animation: checkDraw 0.5s ease-out 0.3s both;
}

@keyframes checkDraw {
    from { stroke-dasharray: 100; stroke-dashoffset: 100; }
    to { stroke-dasharray: 100; stroke-dashoffset: 0; }
}

.success-box h2 {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.success-box p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    font-size: 16px;
    line-height: 1.6;
}

.success-box .btn-primary {
    max-width: 300px;
    margin: 0 auto;
}

/* =========================================
   FORM STATUS
   ========================================= */
.form-status {
    margin-top: var(--spacing-md);
    padding: 14px var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: 14px;
    display: none;
}

.form-status.error {
    display: block;
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid var(--border-error);
    color: #fca5a5;
}

.form-status.success {
    display: block;
    background: rgba(34, 197, 94, 0.12);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: #86efac;
}

/* =========================================
   FOOTER
   ========================================= */
.form-footer {
    max-width: 560px;
    margin: var(--spacing-xl) auto 0;
    text-align: center;
}

.form-footer p {
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1.6;
}

.form-footer a {
    color: var(--primary-light);
    text-decoration: none;
    transition: color 0.2s;
}

.form-footer a:hover {
    color: var(--primary-orange);
    text-decoration: underline;
}

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 600px) {
    .form-page {
        padding: var(--spacing-lg) var(--spacing-sm) 48px;
    }

    .header-content h1 {
        font-size: 26px;
    }

    .form-card {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .field-row {
        grid-template-columns: 1fr;
    }

    .plan-selector {
        grid-template-columns: 1fr;
    }

    .form-actions.dual {
        grid-template-columns: 1fr;
    }

    .btn-secondary {
        order: 2;
    }

    .step-label {
        font-size: 11px;
    }

    .step-number {
        width: 40px;
        height: 40px;
        font-size: 14px;
    }
}