/* ===========================
   Variables & Reset
   =========================== */
:root {
    /* Colors */
    --color-primary: #1A3A52;
    --color-accent: #F4A259;
    --color-bg: #F8FAFB;
    --color-surface: #FFFFFF;
    --color-text: #1F2937;
    --color-text-muted: #6B7280;
    --color-border: #E5E7EB;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Typography */
    --font-display: 'Playfair Display', serif;
    --font-body: 'DM Sans', sans-serif;
    
    /* Effects */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.15);
    
    /* Animation */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===========================
   Header
   =========================== */
.header {
    position: relative;
    background: linear-gradient(135deg, var(--color-primary) 0%, #2B4A65 100%);
    color: white;
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(244, 162, 89, 0.15) 0%, transparent 70%);
    animation: float 8s ease-in-out infinite;
}

.header-decoration {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, 
        #F4A259 0%, 
        #00A99D 25%, 
        #4A90E2 50%, 
        #9B59B6 75%, 
        #27AE60 100%
    );
}

.header-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
    animation: fadeInDown 0.8s var(--transition-base);
}

.header-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.header-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.header-subtitle {
    font-size: clamp(0.95rem, 2vw, 1.25rem);
    opacity: 0.9;
    font-weight: 500;
    letter-spacing: 0.5px;
}

/* ===========================
   Container
   =========================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
}

/* ===========================
   Sessions Grid
   =========================== */
.sessions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

@media (min-width: 768px) {
    .sessions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1200px) {
    .sessions-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ===========================
   Session Cards
   =========================== */
.session-card {
    position: relative;
    background: var(--color-surface);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    animation: fadeInUp 0.6s var(--transition-base);
    animation-fill-mode: both;
}

.session-card:nth-child(1) { animation-delay: 0.1s; }
.session-card:nth-child(2) { animation-delay: 0.15s; }
.session-card:nth-child(3) { animation-delay: 0.2s; }
.session-card:nth-child(4) { animation-delay: 0.25s; }
.session-card:nth-child(5) { animation-delay: 0.3s; }
.session-card:nth-child(6) { animation-delay: 0.35s; }
.session-card:nth-child(7) { animation-delay: 0.4s; }

.session-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: var(--card-color);
    transition: height var(--transition-base);
}

.session-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.session-card:hover::before {
    height: 10px;
}

.session-number {
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    width: 60px;
    height: 60px;
    background: var(--card-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 900;
    box-shadow: var(--shadow-md);
    z-index: 2;
}

.session-content {
    padding: var(--spacing-lg);
    padding-top: calc(var(--spacing-lg) + 70px);
}

.session-date {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(0, 0, 0, 0.03);
    border-radius: 8px;
    width: fit-content;
}

.calendar-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.session-title {
    font-family: var(--font-body);
    font-size: 1.125rem;
    font-weight: 700;
    line-height: 1.4;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    min-height: 80px;
}

.access-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--card-color);
    color: white;
    border: none;
    border-radius: 10px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.access-btn:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

.access-btn:active {
    transform: scale(0.98);
}

.arrow-icon {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-fast);
}

.access-btn:hover .arrow-icon {
    transform: translateX(4px);
}

/* ===========================
   Info Section
   =========================== */
.info-section {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, rgba(244, 162, 89, 0.08) 0%, rgba(74, 144, 226, 0.08) 100%);
    border-radius: 16px;
    border: 2px dashed var(--color-border);
}

.info-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    max-width: 800px;
    margin: 0 auto;
}

.info-icon {
    width: 32px;
    height: 32px;
    color: var(--color-accent);
    flex-shrink: 0;
}

.info-text {
    font-size: 1rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

/* ===========================
   Footer
   =========================== */
.footer {
    position: relative;
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
    margin-top: var(--spacing-xl);
}

.footer-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, 
        #F4A259 0%, 
        #00A99D 25%, 
        #4A90E2 50%, 
        #9B59B6 75%, 
        #27AE60 100%
    );
}

.footer-content {
    max-width: 600px;
    margin: 0 auto;
}

.footer-content p {
    margin-bottom: var(--spacing-sm);
    opacity: 0.9;
}

.contact-email {
    display: inline-block;
    color: var(--color-accent);
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 700;
    transition: all var(--transition-fast);
    position: relative;
}

.contact-email::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-base);
}

.contact-email:hover::after {
    width: 100%;
}

.contact-email:hover {
    transform: scale(1.05);
}

/* ===========================
   Modal
   =========================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    animation: fadeIn var(--transition-base);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    cursor: pointer;
}

.modal-content {
    position: relative;
    background: var(--color-surface);
    border-radius: 20px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: scaleIn var(--transition-base);
    z-index: 1;
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 40px;
    height: 40px;
    background: rgba(0, 0, 0, 0.05);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    z-index: 2;
}

.modal-close:hover {
    background: rgba(0, 0, 0, 0.1);
    transform: rotate(90deg);
}

.modal-close svg {
    width: 20px;
    height: 20px;
    stroke: var(--color-text);
}

.modal-header {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-md);
    border-bottom: 2px solid var(--color-border);
}

.lock-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-accent) 0%, #E89749 100%);
    border-radius: 50%;
    margin-bottom: var(--spacing-md);
    box-shadow: 0 8px 20px rgba(244, 162, 89, 0.3);
}

.lock-icon svg {
    width: 36px;
    height: 36px;
    stroke: white;
}

.modal-title {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 900;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.modal-subtitle {
    font-size: 1rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

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

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
}

.form-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: 10px;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: all var(--transition-fast);
    background: var(--color-bg);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 4px rgba(244, 162, 89, 0.1);
}

.form-hint {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

.error-message {
    display: none;
    padding: var(--spacing-sm) var(--spacing-md);
    background: #FEE2E2;
    border: 1px solid #FCA5A5;
    border-radius: 8px;
    color: #991B1B;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.error-message.active {
    display: block;
    animation: shake 0.4s;
}

.submit-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    width: 100%;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-accent) 0%, #E89749 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-family: var(--font-body);
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: 0 4px 12px rgba(244, 162, 89, 0.3);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(244, 162, 89, 0.4);
}

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

.btn-icon {
    width: 20px;
    height: 20px;
}

/* ===========================
   Animations
   =========================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 768px) {
    .session-title {
        min-height: auto;
        font-size: 1rem;
    }
    
    .session-number {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
    
    .session-content {
        padding: var(--spacing-md);
        padding-top: calc(var(--spacing-md) + 60px);
    }
    
    .info-card {
        flex-direction: column;
        text-align: center;
    }
}

/* ===========================
   Print Styles
   =========================== */
@media print {
    .access-btn,
    .footer,
    .modal {
        display: none;
    }
}


/* ===========================
   General Access Section
   =========================== */
.general-access-section {
    margin: 0 auto 2.5rem auto;
    max-width: 860px;
    padding: 0 1.5rem;
}

.general-access-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: linear-gradient(135deg, #1A3A52 0%, #2B7DBC 100%);
    border-radius: 16px;
    padding: 1.5rem 2rem;
    box-shadow: 0 8px 32px rgba(43, 125, 188, 0.25);
    flex-wrap: wrap;
}

.general-access-icon {
    width: 52px;
    height: 52px;
    background: rgba(255,255,255,0.15);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.general-access-icon svg {
    width: 26px;
    height: 26px;
    stroke: white;
}

.general-access-info {
    flex: 1;
    min-width: 180px;
}

.general-access-info h3 {
    color: white;
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0 0 0.25rem 0;
}

.general-access-info p {
    color: rgba(255,255,255,0.8);
    font-size: 0.875rem;
    margin: 0;
}

.general-access-btn {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: white;
    color: #1A3A52;
    border: none;
    border-radius: 10px;
    padding: 0.75rem 1.4rem;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    font-family: inherit;
}

.general-access-btn svg {
    width: 18px;
    height: 18px;
    stroke: #1A3A52;
}

.general-access-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.2);
    background: #f0f8ff;
}

/* Unlocked state */
.general-access-unlocked {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background: linear-gradient(135deg, #1a5c34 0%, #27AE60 100%);
    border-radius: 16px;
    padding: 1.25rem 2rem;
    box-shadow: 0 8px 32px rgba(39, 174, 96, 0.25);
}

.unlocked-icon {
    width: 48px;
    height: 48px;
    background: rgba(255,255,255,0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.unlocked-icon svg {
    width: 24px;
    height: 24px;
    stroke: white;
}

.unlocked-info h3 {
    color: white;
    font-size: 1.05rem;
    font-weight: 700;
    margin: 0 0 0.2rem 0;
}

.unlocked-info p {
    color: rgba(255,255,255,0.85);
    font-size: 0.875rem;
    margin: 0;
}

/* Unlocked session card button style */
.session-card.unlocked .access-btn.unlocked-btn {
    background: linear-gradient(135deg, var(--card-color, #2B7DBC), color-mix(in srgb, var(--card-color, #2B7DBC) 80%, black));
    color: white;
    border: none;
}

.session-card.unlocked .access-btn.unlocked-btn:hover {
    filter: brightness(1.1);
}

/* Responsive */
@media (max-width: 600px) {
    .general-access-card {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    .general-access-btn {
        width: 100%;
        justify-content: center;
    }
}


/* ===========================
   Disabled session button
   =========================== */
.access-btn--disabled {
    background: #e0e0e0 !important;
    color: #999 !important;
    border: none !important;
    cursor: not-allowed !important;
    pointer-events: none;
    box-shadow: none !important;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.85;
}

.access-btn--disabled svg {
    stroke: #bbb;
}

.session-card:has(.access-btn--disabled) {
    opacity: 0.72;
    filter: grayscale(0.3);
}


/* ===========================
   Edvolution Logo Section
   =========================== */
.edvolution-logo-section {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem 1.5rem 1.5rem;
    background: #fff;
}

.edvolution-logo {
    max-width: 380px;
    width: 100%;
    height: auto;
    opacity: 0.9;
}

@media (max-width: 480px) {
    .edvolution-logo {
        max-width: 260px;
    }
}