@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

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

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #1a1a25;
    --bg-card-hover: #222230;
    --bg-input: #0f0f18;
    --border-color: #2a2a3a;
    --border-focus: #6c5ce7;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b80;
    --accent-primary: #6c5ce7;
    --accent-secondary: #a855f7;
    --accent-gradient: linear-gradient(135deg, #6c5ce7 0%, #a855f7 50%, #ec4899 100%);
    --accent-glow: 0 0 30px rgba(108, 92, 231, 0.4);
    --success: #00d9a3;
    --danger: #ef4444;
    --section-header-bg: rgba(255, 255, 255, 0.02);
}

.light-theme {
    --bg-primary: #f0f2f5;
    --bg-secondary: #e8eaed;
    --bg-card: #ffffff;
    --bg-card-hover: #f8f9fa;
    --bg-input: #f5f6f8;
    --border-color: #d1d5db;
    --border-focus: #6c5ce7;
    --text-primary: #1a1a2e;
    --text-secondary: #555770;
    --text-muted: #9ca3af;
    --accent-primary: #6c5ce7;
    --accent-secondary: #a855f7;
    --accent-gradient: linear-gradient(135deg, #6c5ce7 0%, #a855f7 50%, #ec4899 100%);
    --accent-glow: 0 0 30px rgba(108, 92, 231, 0.2);
    --success: #059669;
    --danger: #dc2626;
    --section-header-bg: rgba(0, 0, 0, 0.02);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    min-height: 100vh;
    padding: 20px;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 20%, rgba(108, 92, 231, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(168, 85, 247, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(236, 72, 153, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 950px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* Header */
header {
    text-align: center;
    padding: 50px 30px 40px;
    position: relative;
}

header::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    background: var(--accent-gradient);
    filter: blur(100px);
    opacity: 0.3;
    pointer-events: none;
}

.logo {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: var(--accent-gradient);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    box-shadow: var(--accent-glow);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

header h1 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

header p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    font-weight: 300;
}

/* Form Container */
.form-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Section */
.section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
    animation: fadeInUp 0.5s ease forwards;
    opacity: 0;
}

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

.section:nth-child(1) { animation-delay: 0.1s; }
.section:nth-child(2) { animation-delay: 0.15s; }
.section:nth-child(3) { animation-delay: 0.2s; }
.section:nth-child(4) { animation-delay: 0.25s; }
.section:nth-child(5) { animation-delay: 0.3s; }

.section:hover {
    border-color: rgba(108, 92, 231, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.section-header {
    padding: 18px 24px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--section-header-bg);
    border-bottom: 1px solid var(--border-color);
}

.section-header .icon {
    width: 36px;
    height: 36px;
    background: var(--accent-gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: 0 4px 12px rgba(108, 92, 231, 0.3);
}

.section-body {
    padding: 24px;
}

/* Form Elements */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    margin-bottom: 18px;
}

.form-row:last-child {
    margin-bottom: 0;
}

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

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 14px 16px;
    background: var(--bg-input);
    border: 1.5px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    font-family: inherit;
    color: var(--text-primary);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
    border-color: rgba(108, 92, 231, 0.4);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.15);
    background: rgba(108, 92, 231, 0.05);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%236b6b80' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 18px;
    padding-right: 40px;
}

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

/* Buttons */
.btn-group {
    display: flex;
    gap: 14px;
    justify-content: center;
    padding: 30px;
    flex-wrap: wrap;
}

.btn {
    padding: 14px 28px;
    border: none;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: inherit;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(108, 92, 231, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(108, 92, 231, 0.5);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
    border: 1.5px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.25);
    transform: translateY(-2px);
}

/* Error State */
.form-group input.error,
.form-group select.error {
    border-color: var(--danger);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

/* Responsive */
@media (max-width: 768px) {
    .form-row {
        grid-template-columns: 1fr;
    }

    header h1 {
        font-size: 1.6rem;
    }

    .btn-group {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .section-body {
        padding: 18px;
    }
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    width: 56px;
    height: 56px;
    border-radius: 16px;
    border: 1.5px solid var(--border-color);
    background: var(--bg-card);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    color: #ffffff;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.theme-toggle:hover {
    border-color: var(--accent-primary);
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(108, 92, 231, 0.3);
}

.light-theme .theme-toggle {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    color: #1a1a2e;
}

.light-theme .section:hover {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}