:root,
.light-theme {
    --bg-gradient-start: #f9faff;
    --bg-gradient-end: #eef2ff;
    --card-bg: rgba(255, 255, 255, 0.75);
    --glass-border: #dee2e6;
    --text-primary: #1e293b;
    --text-secondary: #334155;
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --accent-glow: rgba(99, 102, 241, 0.3);
    --header-bg: rgba(255, 255, 255, 0.8);
    --shadow-sm: 0 8px 20px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 20px 35px -12px rgba(0, 0, 0, 0.1);
    --border-light: rgba(0, 0, 0, 0.05);
    --toggle-bg: #e2e8f0;
    --toggle-knob: #ffffff;
    --toggle-icon: #f59e0b;
}

.dark-theme {
    --bg-gradient-start: #0f172a;
    --bg-gradient-end: #111827;
    --card-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.08);
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --accent: #818cf8;
    --accent-hover: #a5b4fc;
    --accent-glow: rgba(129, 140, 248, 0.3);
    --header-bg: rgba(15, 23, 42, 0.85);
    --shadow-sm: 0 8px 20px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 20px 35px -12px rgba(0, 0, 0, 0.5);
    --border-light: rgba(255, 255, 255, 0.05);
    --toggle-bg: #334155;
    --toggle-knob: #e2e8f0;
    --toggle-icon: #fbbf24;
}

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

body {
    font-family: "Vazirmatn", Tahoma, sans-serif;
    background: linear-gradient(
        135deg,
        var(--bg-gradient-start),
        var(--bg-gradient-end)
    );
    color: var(--text-primary);
    min-height: 100vh;
    transition:
        background-color 0.4s cubic-bezier(0.2, 0.9, 0.4, 1.1),
        color 0.3s ease;
    overflow-x: hidden;
}

.font-lalezar {
    font-family: "Lalezar", cursive;
    letter-spacing: 0.5px;
}

.font-sahel {
    font-family: "Sahel", sans-serif;
}

.glass-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    backdrop-filter: blur(16px);
    background: var(--header-bg);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    padding: 1rem 2rem;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.glass-header .navbar-toggler {
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    background: var(--card-bg);
    border-radius: 10px;
    padding: 0.25rem 0.5rem;
}

.glass-header .navbar-toggler i {
    font-size: 1.25rem;
}

.glass-header .navbar-toggler:focus {
    box-shadow: 0 0 0 0.2rem var(--accent-glow);
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), #c084fc);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.logo i {
    font-size: 2rem;
    color: var(--accent);
    -webkit-background-clip: unset;
    background-clip: unset;
}

.register-btn {
    background: var(--accent);
    border: none;
    padding: 0.9rem 2.2rem;
    border-radius: 60px;
    font-size: 1rem;
    font-weight: 600;
    color: white !important;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.4s cubic-bezier(0.34, 1.2, 0.64, 1);
    box-shadow: 0 6px 14px var(--accent-glow);
    text-decoration: none;
}

.register-btn i {
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.register-btn:hover {
    transform: scale(1.05);
    background: var(--accent-hover);
    box-shadow: 0 12px 26px var(--accent-glow);
    gap: 16px;
}

.register-btn:active {
    transform: scale(0.97);
}

.theme-toggle {
    background: var(--toggle-bg);
    width: 58px;
    height: 32px;
    border-radius: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 6px;
    cursor: pointer;
    position: relative;
    transition: background 0.3s ease;
    box-shadow:
        inset 0 1px 3px rgba(0, 0, 0, 0.2),
        0 1px 2px rgba(255, 255, 255, 0.1);
}

.toggle-knob {
    position: absolute;
    width: 26px;
    height: 26px;
    background: var(--toggle-knob);
    border-radius: 50%;
    top: 1px;
    left: 1px;
    transition: transform 0.4s cubic-bezier(0.34, 1.2, 0.64, 1);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
    transform: translateX(26px);
}

.dark-theme .toggle-knob {
    transform: translateX(0);
}

.theme-toggle i {
    font-size: 14px;
    z-index: 2;
    transition: opacity 0.2s;
    color: var(--toggle-icon);
    margin-top: 4px;
}

.theme-toggle .bi-sun-fill {
    margin-right: 1px;
}

.dark-theme .theme-toggle .bi-sun-fill {
    opacity: 0.6;
}

.light-theme .theme-toggle .bi-sun-fill {
    opacity: 1;
}

.light-theme .theme-toggle .bi-moon-stars-fill {
    opacity: 0.6;
}

.dark-theme .theme-toggle .bi-moon-stars-fill {
    opacity: 1;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 2rem 4rem;
}

.hero-content {
    max-width: 1100px;
    text-align: center;
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

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

.badge-custom {
    display: inline-block;
    background: var(--accent-glow);
    backdrop-filter: blur(6px);
    padding: 0.4rem 1rem;
    border-radius: 40px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 1.8rem;
    border: 1px solid var(--glass-border);
}

.hero h1 {
    font-size: clamp(2.5rem, 7vw, 4.5rem);
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, var(--text-primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 650px;
    margin: 0 auto 2rem;
    line-height: 1.6;
}

.cards-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    margin-top: 4rem;
}

.feature-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border-radius: 36px;
    padding: 1.8rem 1.5rem;
    width: 260px;
    text-align: center;
    border: 1px solid var(--glass-border);
    transition: all 0.35s ease;
    box-shadow: var(--shadow-sm);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent);
}

.feature-card i {
    font-size: 2.8rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-weight: 700;
    margin-bottom: 0.6rem;
    color: var(--text-primary);
}

.feature-card p {
    font-size: 0.9rem;
    margin: 0;
    color: var(--text-secondary);
}

.footer-note {
    text-align: center;
    padding: 2rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-light);
    margin-top: 2rem;
}

.btn-group-custom {
    display: flex;
    align-items: center;
    gap: 24px;
}

/* Builder: unified BEM classes */
.builder {
    min-width: 360px;
    padding-top: 120px;
}

.builder__layout {
    align-items: stretch;
}

.builder__canvas {
    min-width: 0;
}

.builder__sidebar {
    min-width: 0;
}

.builder__sidebar-panel {
    width: 100%;
}

.builder__sidebar-card {
    border-radius: 14px;
    background: var(--card-bg) !important;
    border: 1px solid var(--glass-border) !important;
    box-shadow: var(--shadow-sm) !important;
}

.builder__sidebar-body {
    scrollbar-width: thin;
}

.builder__slide-list .list-group-item {
    transition:
        background-color 0.2s ease,
        transform 0.2s ease;
}

.builder__slide-list .list-group-item:hover {
    transform: translateX(-2px);
}

.slide-card {
    border-radius: 14px;
    background: var(--card-bg) !important;
    border: 1px solid var(--glass-border) !important;
    box-shadow: var(--shadow-sm) !important;
}

.slide-card__header {
    border-color: rgba(0, 0, 0, 0.08) !important;
}

.slide-card__body {
    width: 100%;
}

.builder__sidebar-toggle {
    border-radius: 12px;
}

.builder .card-header,
.builder .card-footer,
.builder .bg-light,
.builder .bg-white,
.builder .list-group-item {
    background: var(--card-bg) !important;
    color: var(--text-primary) !important;
    border-color: var(--glass-border) !important;
}

.builder .text-dark,
.builder .nav-tabs .nav-link,
.builder h4,
.builder h5 {
    color: var(--text-primary) !important;
}

.builder .text-muted,
.builder .text-secondary,
.builder .form-label,
.builder .form-text {
    color: var(--text-secondary) !important;
}

.builder .form-control,
.builder .form-select {
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.dark-theme .builder .form-control,
.dark-theme .builder .form-select {
    background: rgba(15, 23, 42, 0.45);
}

.builder .form-control:focus,
.builder .form-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 0.2rem var(--accent-glow);
}

.builder .nav-tabs {
    border-bottom-color: var(--glass-border) !important;
}

.builder .nav-tabs .nav-link.active {
    color: #fff !important;
    background: var(--accent) !important;
    border-color: var(--accent) !important;
}

.builder .dropdown-menu {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
}

.builder .dropdown-item {
    color: var(--text-primary);
}

.builder .dropdown-item:hover {
    background: rgba(99, 102, 241, 0.12);
}

/* Responsive improvements (Change 8) */
@media (max-width: 991.98px) {
    .dashboard-container,
    .admin-container {
        padding-right: 0.75rem !important;
        padding-left: 0.75rem !important;
    }
}

@media (max-width: 767.98px) {
    .auth-wrapper,
    .dashboard-container,
    .admin-container {
        padding-top: 100px !important;
    }

    .builder {
        min-width: 360px;
    }

    .builder__sidebar-panel {
        margin-bottom: 1rem;
    }

    .builder__sidebar-card {
        min-height: 420px !important;
    }
}

@media (max-width: 575.98px) {
    .glass-header {
        padding: 0.75rem;
    }

    .nav-container {
        gap: 0.5rem;
    }

    .logo {
        font-size: 1.45rem;
    }
}

@media (max-width: 359.98px) {
    .builder {
        min-width: 100%;
    }
}

@media (max-width: 680px) {
    .nav-container {
        gap: 0.8rem;
    }

    .glass-header {
        padding: 1rem;
    }

    .register-btn {
        padding: 0.65rem 1.6rem;
        font-size: 0.9rem;
    }

    .feature-card {
        width: 100%;
        max-width: 280px;
    }

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