/* Auth Page Styles — Grammers Design System */

:root {
    --bg-dark: #080b10;
    --bg-card: rgba(16, 20, 28, 0.8);
    --bg-input: rgba(16, 20, 28, 0.6);
    --primary: #0D9373;
    --primary-light: #00D4AA;
    --primary-glow: rgba(0, 212, 170, 0.25);
    --text-main: #edf2f7;
    --text-muted: #718096;
    --border-color: rgba(255, 255, 255, 0.08);
    --success: #10B981;
    --danger: #ef4444;
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --radius: 16px;
    --radius-sm: 10px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --gradient-brand: linear-gradient(135deg, #00D4AA, #0D9373);

    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    line-height: 1.5;
}

/* ─── Layout ─── */
.auth-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 100vh;
}

/* ─── Branding Side ─── */
.auth-branding {
    background: var(--gradient-brand);
    padding: var(--space-2xl);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.auth-branding::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.12) 0%, transparent 60%);
    pointer-events: none;
}

.auth-branding::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -20%;
    width: 60%;
    height: 60%;
    background: radial-gradient(circle, rgba(0, 0, 0, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.auth-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    text-decoration: none;
    position: relative;
    z-index: 1;
}

.auth-branding-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    z-index: 1;
}

.auth-branding-content h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--space-md);
    color: white;
    line-height: 1.15;
}

.auth-branding-content p {
    font-size: 1.1rem;
    opacity: 0.92;
    max-width: 400px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.9);
}

/* ─── Form Side ─── */
.auth-form-container {
    background: var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl);
    position: relative;
}

.auth-form-container::before {
    content: '';
    position: absolute;
    top: 20%;
    left: -10%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    pointer-events: none;
    filter: blur(60px);
}

.auth-form-wrapper {
    width: 100%;
    max-width: 420px;
    position: relative;
    z-index: 1;
}

/* ─── Tabs ─── */
.auth-tabs {
    display: flex;
    gap: var(--space-xs);
    margin-bottom: var(--space-xl);
    background: var(--bg-card);
    padding: var(--space-xs);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.auth-tab {
    flex: 1;
    padding: 12px var(--space-md);
    background: transparent;
    border: none;
    border-radius: 8px;
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-main);
}

.auth-tab.active {
    background: var(--gradient-brand);
    color: white;
    font-weight: 600;
}

.auth-tab:hover:not(.active) {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.04);
}

/* ─── Forms ─── */
.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

/* ─── Form Groups ─── */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
    color: var(--text-main);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 14px var(--space-md);
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-size: 1rem;
    font-family: var(--font-main);
    transition: var(--transition);
    backdrop-filter: blur(8px);
}

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

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

/* ─── Select ─── */
.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23718096' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
}

/* ─── Password ─── */
.password-input {
    position: relative;
}

.password-input input {
    padding-right: 48px;
}

.password-toggle {
    position: absolute;
    right: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    opacity: 0.5;
    font-size: 1rem;
    transition: var(--transition);
}

.password-toggle:hover {
    opacity: 1;
}

/* ─── Primary Button ─── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px var(--space-xl);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-main);
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: var(--gradient-brand);
    color: white;
}

.btn-primary:hover {
    box-shadow: 0 6px 24px var(--primary-glow);
    transform: translateY(-1px);
}

.btn-full {
    width: 100%;
}

.btn-text,
.btn-loader {
    display: inline-block;
}

.btn.loading .btn-text {
    display: none;
}

.btn.loading .btn-loader {
    display: inline-block !important;
}

/* ─── Error / Success ─── */
.form-error {
    color: var(--danger);
    font-size: 0.875rem;
    margin-bottom: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--radius-sm);
    display: none;
}

.form-error.visible {
    display: block;
}

.form-success {
    color: var(--success);
    font-size: 0.875rem;
    margin-bottom: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-sm);
    display: none;
}

.form-success.visible {
    display: block;
}

/* ─── Social Login ─── */
.social-divider {
    display: flex;
    align-items: center;
    margin: var(--space-xl) 0;
}

.social-divider::before,
.social-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.social-divider span {
    padding: 0 var(--space-md);
    color: var(--text-muted);
    font-size: 0.85rem;
    white-space: nowrap;
}

.social-buttons {
    display: flex;
    gap: var(--space-md);
}

.social-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 12px var(--space-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-size: 0.9rem;
    font-weight: 500;
    font-family: var(--font-main);
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(8px);
}

.social-btn:hover {
    border-color: rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
}

.social-btn svg {
    flex-shrink: 0;
}

.social-google:hover {
    border-color: #4285F4;
    box-shadow: 0 4px 16px rgba(66, 133, 244, 0.2);
}

.social-apple:hover {
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 16px rgba(255, 255, 255, 0.08);
}

.social-telegram:hover {
    border-color: #0088cc;
    box-shadow: 0 4px 16px rgba(0, 136, 204, 0.2);
}

/* ─── Footer ─── */
.form-footer {
    margin-top: var(--space-lg);
    text-align: center;
}

.form-link {
    color: var(--primary-light);
    font-size: 0.9rem;
    text-decoration: none;
    transition: var(--transition);
}

.form-link:hover {
    text-decoration: underline;
    color: white;
}

.form-note {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ─── Responsive ─── */
@media (max-width: 968px) {
    .auth-container {
        grid-template-columns: 1fr;
    }

    .auth-branding {
        display: none;
    }

    .auth-form-container {
        padding: var(--space-lg);
    }

    .auth-form-wrapper .auth-logo {
        display: block !important;
        margin-bottom: var(--space-xl);
        color: var(--primary-light);
        text-align: center;
        font-size: 1.8rem;
    }
}

@media (max-width: 480px) {
    .auth-form-wrapper {
        max-width: 100%;
    }

    .auth-tabs {
        flex-direction: column;
    }

    .social-buttons {
        flex-direction: column;
    }

    .social-btn span {
        display: inline;
    }

    .auth-form-container {
        padding: var(--space-md);
    }
}