:root {
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --success: #22c55e;
    --error: #ef4444;
    --bg: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-dim: #94a3b8;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Фоновое свечение */
.background-glow {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle at 50% -20%, #1e40af 0%, transparent 50%),
                radial-gradient(circle at 0% 100%, #0f172a 0%, transparent 40%);
    z-index: -1;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 60px;
}

.logo {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -1px;
}

.logo span { color: var(--primary); }

.badge {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--primary);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 12px;
    color: var(--primary);
}

/* Typography */
h1 {
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    text-align: center;
}

.highlight {
    background: linear-gradient(90deg, #60a5fa, #22c55e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    text-align: center;
    color: var(--text-dim);
    font-size: 18px;
    max-width: 600px;
    margin: 0 auto 50px;
}

/* Main Layout */
.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

@media (max-width: 850px) {
    .main-content { grid-template-columns: 1fr; }
}

/* Card Style */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.1);
    padding: 40px;
    border-radius: 24px;
    box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5);
}

.card h3 { margin-bottom: 8px; font-size: 22px; }
.card-desc { color: var(--text-dim); font-size: 14px; margin-bottom: 25px; }

/* Form Elements */
.input-group {
    position: relative;
    margin-bottom: 20px;
}

.input-group i {
    position: absolute;
    left: 15px;
    top: 15px;
    color: var(--text-dim);
    transition: 0.3s;
}

input, textarea {
    width: 100%;
    padding: 14px 15px 14px 45px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 12px;
    color: white;
    font-family: inherit;
    transition: 0.3s;
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(15, 23, 42, 0.9);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

input.invalid { border-color: var(--error); animation: shake 0.4s; }

.error-msg {
    color: var(--error);
    font-size: 11px;
    margin-top: 5px;
    display: none;
}

input.invalid + .error-msg { display: block; }

textarea { height: 100px; resize: none; }

/* Checkbox */
.checkbox-container {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 13px;
    margin-bottom: 25px;
}

.checkbox-container input { display: none; }

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.2);
    border-radius: 6px;
    position: relative;
    transition: 0.3s;
}

.checkbox-container input:checked + .checkmark {
    background: var(--primary);
    border-color: var(--primary);
}

.checkbox-container input:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    color: white;
    font-size: 14px;
    left: 3px;
    top: -2px;
}

/* Button */
button {
    width: 100%;
    padding: 16px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: 0.3s;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

button:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px var(--primary);
}

button:active { transform: translateY(0); }

button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* Features Grid */
.features-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: rgba(255,255,255,0.03);
    border-radius: 16px;
    transition: 0.3s;
}

.feature-item:hover {
    background: rgba(255,255,255,0.06);
    transform: translateX(10px);
}

.icon-box {
    width: 50px;
    height: 50px;
    background: rgba(59, 130, 246, 0.15);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 20px;
}

/* Status Messages */
.status-message {
    margin-top: 20px;
    padding: 12px;
    border-radius: 10px;
    text-align: center;
    font-size: 14px;
    display: none;
}

.status-message.success {
    display: block;
    background: rgba(34, 197, 94, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
}

.status-message.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
    border: 1px solid var(--error);
}

/* Loader */
.loader {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
    display: none;
    position: absolute;
}

button.loading .btn-text { opacity: 0; }
button.loading .loader { display: block; }

/* Animations */
@keyframes spin { to { transform: rotate(360deg); } }

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

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