:root {
    --brand-primary: #b11226;
    --brand-accent: #d73a52;
    --brand-deep: #7f0d1c;
    --brand-soft: #fff1f3;
    --brand-surface: rgba(255, 255, 255, 0.82);
    --brand-border: rgba(177, 18, 38, 0.12);
    --text-primary: #1f1720;
    --text-muted: #6b5b62;
    --surface-primary: #ffffff;
    --surface-secondary: #fff8f9;
    --shadow-soft: 0 18px 45px rgba(127, 13, 28, 0.08);
    --shadow-card: 0 24px 60px rgba(177, 18, 38, 0.12);
    --radius-lg: 24px;
    --radius-md: 18px;
    --radius-sm: 12px;
    
    /* New modern design tokens */
    --gradient-primary: linear-gradient(135deg, #b11226 0%, #d73a52 100%);
    --gradient-subtle: linear-gradient(180deg, #ffffff 0%, #fff9fa 100%);
    --shadow-glow: 0 0 40px rgba(177, 18, 38, 0.15);
    --shadow-elevated: 0 8px 30px rgba(0, 0, 0, 0.12);
    --shadow-float: 0 20px 60px rgba(177, 18, 38, 0.15);
    --border-subtle: rgba(177, 18, 38, 0.08);
    --border-accent: rgba(177, 18, 38, 0.2);
    --surface-glass: rgba(255, 255, 255, 0.7);
    --surface-elevated: rgba(255, 255, 255, 0.95);
    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

html {
    font-size: 16px;
    min-height: 100%;
}

body {
    min-height: 100vh;
    margin: 0;
    font-family: "Inter", "Segoe UI", sans-serif;
    color: var(--text-primary);
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(215, 58, 82, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 100% 50%, rgba(177, 18, 38, 0.08), transparent),
        radial-gradient(ellipse 50% 30% at 0% 80%, rgba(215, 58, 82, 0.06), transparent),
        linear-gradient(180deg, #ffffff 0%, #fff9fa 50%, #fff4f6 100%);
    position: relative;
    overflow-x: hidden;
}

.app-bg-orb {
    position: fixed;
    width: 30rem;
    height: 30rem;
    border-radius: 50%;
    pointer-events: none;
    filter: blur(20px);
    z-index: -1;
    animation: float 20s ease-in-out infinite;
}

.app-bg-orb-1 {
    top: -10rem;
    right: -12rem;
    background: radial-gradient(circle, rgba(215, 58, 82, 0.18), rgba(177, 18, 38, 0.08));
    animation-delay: 0s;
}

.app-bg-orb-2 {
    bottom: -12rem;
    left: -12rem;
    background: radial-gradient(circle, rgba(177, 18, 38, 0.12), rgba(215, 58, 82, 0.06));
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(20px, -20px) scale(1.05); }
    50% { transform: translate(-10px, 20px) scale(0.95); }
    75% { transform: translate(-20px, -10px) scale(1.02); }
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: -0.03em;
}

p {
    color: var(--text-muted);
}

a {
    color: var(--brand-primary);
    text-decoration: none;
}

a:hover {
    color: var(--brand-deep);
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 1030;
    padding: 1.25rem 0 0;
    isolation: isolate;
}

.site-header::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: calc(100% + 1rem);
    background: linear-gradient(
        180deg,
        rgba(255, 255, 255, 0.95) 0%,
        rgba(255, 255, 255, 0.85) 70%,
        transparent 100%
    );
    z-index: -1;
    pointer-events: none;
    backdrop-filter: blur(20px);
}

.premium-navbar {
    margin: 0 auto;
    width: min(1320px, calc(100% - 1.5rem));
    border: 1px solid var(--border-subtle);
    background: var(--surface-glass);
    backdrop-filter: blur(24px);
    box-shadow: var(--shadow-elevated);
    border-radius: 20px;
    transition: var(--transition-smooth);
}

.premium-navbar:hover {
    box-shadow: var(--shadow-float);
    border-color: var(--border-accent);
}

.premium-nav-inner {
    padding: 0.9rem 1.5rem;
}

.premium-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.9rem;
    color: var(--text-primary);
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.05em;
    transition: var(--transition-smooth);
}

.premium-brand:hover {
    transform: scale(1.02);
}

.brand-mark {
    width: 2.8rem;
    height: 2.8rem;
    border-radius: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 12px 28px rgba(177, 18, 38, 0.3);
    transition: var(--transition-smooth);
}

.brand-mark:hover {
    box-shadow: 0 16px 36px rgba(177, 18, 38, 0.4);
    transform: translateY(-2px);
}

.premium-nav-links {
    gap: 0.45rem;
    margin-left: 2rem;
    align-items: center;
}

.top-nav-link {
    position: relative;
    color: var(--text-primary);
    font-weight: 600;
    padding: 0.75rem 1.15rem !important;
    border-radius: 14px;
    transition: var(--transition-smooth);
}

.top-nav-link::after {
    content: "";
    position: absolute;
    left: 1rem;
    right: 1rem;
    bottom: 0.4rem;
    height: 3px;
    border-radius: 999px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: center;
    transition: var(--transition-smooth);
}

.top-nav-link:hover,
.top-nav-link.active {
    color: var(--brand-primary) !important;
    background: rgba(177, 18, 38, 0.08);
    transform: translateY(-1px);
}

.top-nav-link:hover::after,
.top-nav-link.active::after {
    transform: scaleX(1);
}

.premium-nav-dropdown .dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.premium-nav-dropdown .dropdown-toggle::after {
    margin-left: 0.35rem;
}

.premium-dropdown-menu {
    margin-top: 0.9rem;
    min-width: 15rem;
    padding: 0.75rem;
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    box-shadow: var(--shadow-float);
    background: var(--surface-elevated);
    backdrop-filter: blur(20px);
    transition: var(--transition-smooth);
}

.premium-dropdown-menu .dropdown-item {
    border-radius: 12px;
    padding: 0.85rem 1rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: var(--transition-smooth);
}

.premium-dropdown-menu .dropdown-item:hover,
.premium-dropdown-menu .dropdown-item:focus,
.premium-dropdown-menu .dropdown-item.active {
    background: rgba(177, 18, 38, 0.1);
    color: var(--brand-primary);
    transform: translateX(4px);
}

.premium-nav-actions {
    gap: 0.75rem;
    align-items: center;
}

.premium-toggler {
    border: none;
    box-shadow: none !important;
}

.site-main {
    padding-top: 2.6rem;
    padding-bottom: 2.5rem;
}

.btn {
    border-radius: 14px;
    font-weight: 700;
    padding: 0.85rem 1.5rem;
    border-width: 1px;
    box-shadow: none;
    transition: var(--transition-smooth);
    letter-spacing: -0.01em;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-elevated);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary,
.btn-danger {
    color: #fff;
    background: var(--gradient-primary);
    border-color: transparent;
    box-shadow: 0 12px 28px rgba(177, 18, 38, 0.25);
}

.btn-primary:hover,
.btn-primary:focus,
.btn-danger:hover,
.btn-danger:focus {
    color: #fff;
    background: linear-gradient(
        135deg,
        var(--brand-deep),
        var(--brand-primary)
    );
    border-color: transparent;
    box-shadow: 0 16px 36px rgba(177, 18, 38, 0.35);
}

.btn-outline-primary,
.btn-outline-danger {
    color: var(--brand-primary);
    border-color: rgba(177, 18, 38, 0.24);
    background: rgba(255, 255, 255, 0.7);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus,
.btn-outline-danger:hover,
.btn-outline-danger:focus {
    color: #fff;
    background: var(--gradient-primary);
    border-color: transparent;
    box-shadow: 0 14px 32px rgba(177, 18, 38, 0.3);
}

.btn-secondary {
    color: var(--text-primary);
    background: #f6ecef;
    border-color: #f6ecef;
}

.btn-secondary:hover,
.btn-secondary:focus {
    color: var(--text-primary);
    background: #eedfe3;
    border-color: #eedfe3;
}

.form-control,
.form-select {
    border-radius: 12px;
    border: 1px solid var(--border-subtle);
    padding: 0.9rem 1.1rem;
    color: var(--text-primary);
    background-color: var(--surface-elevated);
    box-shadow: inset 0 2px 4px rgba(31, 23, 32, 0.03);
    transition: var(--transition-smooth);
}

.form-control:focus,
.form-select:focus,
.form-check-input:focus {
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 0.25rem rgba(177, 18, 38, 0.12);
    background-color: #fff;
}

.form-check-input:checked {
    background-color: var(--brand-primary);
    border-color: var(--brand-primary);
}

.alert {
    border-radius: 16px;
    border: none;
    box-shadow: var(--shadow-elevated);
    backdrop-filter: blur(10px);
}

.page-header,
.hero-section,
.login-card,
.register-card,
.contact-form,
.course-card,
.service-card,
.content-section,
.feature-card {
    border: 1px solid var(--border-subtle);
}

.page-header {
    background: var(--gradient-primary) !important;
    border-radius: var(--radius-lg) !important;
    box-shadow: var(--shadow-float);
    padding: 3rem 2.5rem;
    margin-bottom: 2.5rem;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.15), transparent 70%);
    pointer-events: none;
}

.page-header h1,
.page-header h2,
.page-header h3,
.page-header p {
    color: #ffffff !important;
    position: relative;
    z-index: 1;
}

.page-header p {
    max-width: 52rem;
    margin: 1rem auto 0;
    opacity: 0.95;
}

.page-header,
.hero-section,
.home-hero,
.auth-page-header,
.register-page-header,
.role-dashboard-hero,
.user-management-hero,
.customer-hero,
.commission-hero,
.activity-hero,
.client-detail-hero,
.my-courses-hero,
.course-hero,
.learning-header {
    background: linear-gradient(160deg, rgba(127, 13, 28, 0.96), rgba(177, 18, 38, 0.94) 48%, rgba(215, 58, 82, 0.9) 100%) !important;
    color: #ffffff !important;
    border: 1px solid rgba(177, 18, 38, 0.12) !important;
    box-shadow: var(--shadow-card) !important;
    position: relative;
    overflow: hidden;
}

.page-header h1,
.page-header h2,
.page-header h3,
.page-header p,
.page-header li,
.page-header small,
.hero-section h1,
.hero-section h2,
.hero-section h3,
.hero-section p,
.hero-section li,
.hero-section small,
.home-hero h1,
.home-hero h2,
.home-hero h3,
.home-hero p,
.home-hero li,
.home-hero small,
.auth-page-header h1,
.auth-page-header h2,
.auth-page-header h3,
.auth-page-header p,
.auth-page-header li,
.auth-page-header small,
.register-page-header h1,
.register-page-header h2,
.register-page-header h3,
.register-page-header p,
.register-page-header li,
.register-page-header small,
.role-dashboard-hero h1,
.role-dashboard-hero h2,
.role-dashboard-hero h3,
.role-dashboard-hero p,
.role-dashboard-hero li,
.role-dashboard-hero small,
.user-management-hero h1,
.user-management-hero h2,
.user-management-hero h3,
.user-management-hero p,
.user-management-hero li,
.user-management-hero small,
.customer-hero h1,
.customer-hero h2,
.customer-hero h3,
.customer-hero p,
.customer-hero li,
.customer-hero small,
.commission-hero h1,
.commission-hero h2,
.commission-hero h3,
.commission-hero p,
.commission-hero li,
.commission-hero small,
.activity-hero h1,
.activity-hero h2,
.activity-hero h3,
.activity-hero p,
.activity-hero li,
.activity-hero small,
.client-detail-hero h1,
.client-detail-hero h2,
.client-detail-hero h3,
.client-detail-hero p,
.client-detail-hero li,
.client-detail-hero small,
.my-courses-hero h1,
.my-courses-hero h2,
.my-courses-hero h3,
.my-courses-hero p,
.my-courses-hero li,
.my-courses-hero small,
.course-hero h1,
.course-hero h2,
.course-hero h3,
.course-hero p,
.course-hero li,
.course-hero small,
.learning-header h1,
.learning-header h2,
.learning-header h3,
.learning-header p,
.learning-header li,
.learning-header small {
    color: #ffffff !important;
    position: relative;
    z-index: 1;
}

.page-header .section-kicker,
.hero-section .section-kicker,
.home-hero .section-kicker,
.auth-page-header .section-kicker,
.register-page-header .section-kicker,
.role-dashboard-hero .section-kicker,
.user-management-hero .section-kicker,
.customer-hero .section-kicker,
.commission-hero .section-kicker,
.activity-hero .section-kicker,
.client-detail-hero .section-kicker,
.my-courses-hero .section-kicker,
.course-hero .section-kicker,
.learning-header .section-kicker {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.16);
}

.content-section,
.feature-card,
.service-card,
.course-card,
.contact-form,
.login-card,
.register-card {
    background: var(--surface-elevated);
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(12px);
    transition: var(--transition-smooth);
}

.feature-card:hover,
.service-card:hover,
.course-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-float);
    border-color: var(--border-accent);
}

.site-footer {
    margin-top: 3rem;
    padding: 3rem 0 3.5rem;
}

.site-footer .container {
    background: var(--surface-glass);
    border: 1px solid var(--border-subtle);
    border-radius: 24px;
    box-shadow: var(--shadow-elevated);
    padding: 2.5rem;
    backdrop-filter: blur(16px);
    transition: var(--transition-smooth);
}

.site-footer .container:hover {
    box-shadow: var(--shadow-float);
}

.footer-brand {
    font-size: 1.45rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    letter-spacing: -0.03em;
}

.footer-copy,
.footer-meta {
    color: var(--text-muted);
    line-height: 1.6;
}

.footer-links-wrap {
    display: flex;
    gap: 1.5rem;
    justify-content: flex-end;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.footer-links-wrap a {
    color: var(--brand-primary);
    font-weight: 700;
    transition: var(--transition-smooth);
    padding: 0.5rem 0;
    position: relative;
}

.footer-links-wrap a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-smooth);
}

.footer-links-wrap a:hover::after {
    width: 100%;
}

.premium-panel {
    background: var(--surface-glass);
    border: 1px solid var(--border-subtle);
    border-radius: 28px;
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(16px);
    transition: var(--transition-smooth);
}

.premium-panel:hover {
    box-shadow: var(--shadow-float);
    border-color: var(--border-accent);
}

.section-kicker {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    background: rgba(177, 18, 38, 0.1);
    color: var(--brand-primary);
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    backdrop-filter: blur(8px);
}

.stat-card {
    padding: 1.75rem;
    border-radius: 20px;
    background: var(--surface-elevated);
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-soft);
    height: 100%;
    transition: var(--transition-smooth);
    backdrop-filter: blur(12px);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-float);
    border-color: var(--border-accent);
}

.stat-card strong {
    display: block;
    font-size: 2.25rem;
    color: var(--brand-primary);
    letter-spacing: -0.05em;
    font-weight: 800;
}

.stat-card span {
    font-weight: 600;
    color: var(--text-muted);
}

.info-card {
    padding: 1.75rem;
    border-radius: 20px;
    background: var(--surface-elevated);
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-soft);
    height: 100%;
    backdrop-filter: blur(12px);
    transition: var(--transition-smooth);
}

.info-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-float);
}

.badge-soft {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 0.4rem 0.9rem;
    background: var(--brand-soft);
    color: var(--brand-primary);
    font-weight: 800;
    font-size: 0.85rem;
    letter-spacing: 0.02em;
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

.shadow-hover {
    transition: var(--transition-smooth);
}

.shadow-hover:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-float);
}

@media (max-width: 991.98px) {
    .premium-navbar {
        width: calc(100% - 1rem);
    }

    .premium-nav-links {
        margin-left: 0;
        padding-top: 1rem;
        padding-bottom: 1rem;
    }

    .premium-nav-actions {
        padding-top: 0.5rem;
    }

    .footer-links-wrap {
        justify-content: flex-start;
    }
}

@media (max-width: 767.98px) {
    .site-main {
        padding-top: 1.4rem;
    }

    .premium-nav-inner {
        padding: 0.85rem 1rem;
    }

    .btn {
        width: 100%;
    }

    .premium-nav-actions {
        width: 100%;
    }
}