/**
 * =========================================================
 * StudyMart — Public Website Styles
 * =========================================================
 * 
 * Design System:
 *   Primary:   #4361EE (Royal Blue)
 *   Secondary: #7209B7 (Vivid Purple)
 *   Accent:    #4CC9F0 (Electric Cyan)
 *   Success:   #06D6A0 (Emerald)
 *   Warning:   #FFB703 (Amber)
 *   Danger:    #EF476F (Coral Red)
 *   Dark:      #1A1A2E (Charcoal)
 * 
 *   Font: Inter (UI), JetBrains Mono (code)
 * =========================================================
 */

/* ═══════════════════════════════════════════════════════════
   CSS CUSTOM PROPERTIES (Design Tokens)
   ═══════════════════════════════════════════════════════════ */

:root {
    /* ─── Brand Colors ─────────────────────────────────── */
    --clr-primary:       #4361EE;
    --clr-primary-dark:  #3A0CA3;
    --clr-primary-light: #7B93F5;
    --clr-secondary:     #7209B7;
    --clr-accent:        #4CC9F0;
    --clr-success:       #06D6A0;
    --clr-warning:       #FFB703;
    --clr-danger:        #EF476F;

    /* ─── Neutral Colors ───────────────────────────────── */
    --clr-dark:          #1A1A2E;
    --clr-dark-2:        #16213E;
    --clr-medium:        #6C757D;
    --clr-light:         #F8F9FA;
    --clr-white:         #FFFFFF;
    --clr-border:        #E2E8F0;

    /* ─── Text Colors ──────────────────────────────────── */
    --clr-text:          #2D3748;
    --clr-text-light:    #718096;
    --clr-text-heading:  #1A202C;

    /* ─── Gradients ────────────────────────────────────── */
    --gradient-primary:  linear-gradient(135deg, #4361EE, #7209B7);
    --gradient-hero:     linear-gradient(135deg, #3A0CA3, #4361EE);
    --gradient-cta:      linear-gradient(135deg, #4361EE, #4CC9F0);
    --gradient-dark:     linear-gradient(135deg, #1A1A2E, #16213E);

    /* ─── Typography ───────────────────────────────────── */
    --font-primary:      'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono:         'JetBrains Mono', 'Fira Code', monospace;

    /* ─── Spacing ──────────────────────────────────────── */
    --section-padding:   6rem;
    --card-radius:       12px;
    --btn-radius:        8px;

    /* ─── Shadows ──────────────────────────────────────── */
    --shadow-sm:         0 1px 3px rgba(0,0,0,0.08);
    --shadow-md:         0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg:         0 8px 30px rgba(0,0,0,0.12);
    --shadow-xl:         0 20px 60px rgba(0,0,0,0.15);
    --shadow-primary:    0 8px 25px rgba(67, 97, 238, 0.3);
    --shadow-card-hover: 0 12px 40px rgba(0,0,0,0.15);

    /* ─── Transitions ──────────────────────────────────── */
    --transition-fast:   0.15s ease;
    --transition-base:   0.3s ease;
    --transition-slow:   0.5s ease;
}

/* ═══════════════════════════════════════════════════════════
   GLOBAL RESETS & BASE STYLES
   ═══════════════════════════════════════════════════════════ */

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    color: var(--clr-text);
    background-color: var(--clr-white);
    line-height: 1.7;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--clr-text-heading);
    line-height: 1.3;
}

a {
    color: var(--clr-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--clr-primary-dark);
}

img {
    max-width: 100%;
    height: auto;
}

/* ─── Text Gradient Utility ────────────────────────────── */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ─── Section Spacing ──────────────────────────────────── */
.section-padding {
    padding: var(--section-padding) 0;
}

.min-vh-75 {
    min-height: 75vh;
}

/* ═══════════════════════════════════════════════════════════
   NAVIGATION BAR
   ═══════════════════════════════════════════════════════════ */

#mainNavbar {
    background: var(--gradient-dark);
    padding: 0.8rem 0;
    transition: all var(--transition-base);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    z-index: 1050;
}

#mainNavbar.scrolled {
    padding: 0.5rem 0;
    box-shadow: var(--shadow-lg);
}

.brand-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--clr-white);
}

.brand-text {
    font-weight: 800;
    font-size: 1.3rem;
    letter-spacing: -0.5px;
}

#mainNavbar .nav-link {
    color: rgba(255, 255, 255, 0.75);
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.5rem 0.85rem;
    border-radius: var(--btn-radius);
    transition: all var(--transition-fast);
    position: relative;
}

#mainNavbar .nav-link:hover,
#mainNavbar .nav-link.active {
    color: var(--clr-white);
    background: rgba(255, 255, 255, 0.1);
}

#mainNavbar .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--clr-accent);
    border-radius: 2px;
}

/* ═══════════════════════════════════════════════════════════
   HERO SECTION
   ═══════════════════════════════════════════════════════════ */

.hero-section {
    background: var(--gradient-dark);
    position: relative;
    overflow: hidden;
    padding: 2rem 0 4rem;
    color: var(--clr-white);
}

/* Animated background shapes */
.hero-bg-shapes {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.hero-bg-shapes .shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.08;
}

.shape-1 {
    width: 600px;
    height: 600px;
    background: var(--clr-primary);
    top: -200px;
    right: -100px;
    animation: float 20s ease-in-out infinite;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: var(--clr-secondary);
    bottom: -150px;
    left: -100px;
    animation: float 25s ease-in-out infinite reverse;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: var(--clr-accent);
    top: 40%;
    left: 50%;
    animation: float 15s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25%      { transform: translate(30px, -40px) scale(1.05); }
    50%      { transform: translate(-20px, 20px) scale(0.95); }
    75%      { transform: translate(15px, 30px) scale(1.02); }
}

.hero-badge {
    display: inline-block;
    background: rgba(76, 201, 240, 0.15);
    color: var(--clr-accent);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(76, 201, 240, 0.2);
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    letter-spacing: -1px;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    color: var(--clr-white);
}

.hero-subtitle {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 550px;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero-actions .btn-primary {
    background: var(--clr-primary);
    border: none;
    border-radius: var(--btn-radius);
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    box-shadow: var(--shadow-primary);
    transition: all var(--transition-base);
}

.hero-actions .btn-primary:hover {
    background: var(--clr-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(67, 97, 238, 0.4);
}

.hero-actions .btn-outline-light {
    border-radius: var(--btn-radius);
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-width: 2px;
    transition: all var(--transition-base);
}

.hero-actions .btn-outline-light:hover {
    transform: translateY(-2px);
}

/* Hero Stats */
.hero-stat {
    text-align: center;
    padding-right: 1.5rem;
    border-right: 1px solid rgba(255, 255, 255, 0.15);
}

.hero-stat:last-child {
    border-right: none;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--clr-accent);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

/* Hero Floating Cards */
.hero-visual {
    position: relative;
    height: 450px;
}

.hero-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 16px;
    padding: 1.2rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    color: var(--clr-white);
    font-weight: 600;
    font-size: 0.95rem;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
}

.hero-card:hover {
    transform: scale(1.05);
    background: rgba(255, 255, 255, 0.12);
}

.hero-card i {
    font-size: 1.5rem;
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
}

.hero-card-1 {
    top: 10%;
    left: 10%;
    animation: floatCard 6s ease-in-out infinite;
}
.hero-card-1 i { background: rgba(67, 97, 238, 0.3); color: #7B93F5; }

.hero-card-2 {
    top: 5%;
    right: 5%;
    animation: floatCard 8s ease-in-out infinite 1s;
}
.hero-card-2 i { background: rgba(114, 9, 183, 0.3); color: #B44CE0; }

.hero-card-3 {
    bottom: 30%;
    left: 5%;
    animation: floatCard 7s ease-in-out infinite 0.5s;
}
.hero-card-3 i { background: rgba(76, 201, 240, 0.3); color: #4CC9F0; }

.hero-card-4 {
    bottom: 10%;
    right: 10%;
    animation: floatCard 9s ease-in-out infinite 2s;
}
.hero-card-4 i { background: rgba(6, 214, 160, 0.3); color: #06D6A0; }

@keyframes floatCard {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-15px); }
}

/* ═══════════════════════════════════════════════════════════
   SECTION HEADERS
   ═══════════════════════════════════════════════════════════ */

.section-badge {
    display: inline-block;
    background: rgba(67, 97, 238, 0.1);
    color: var(--clr-primary);
    padding: 0.35rem 1rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 0.75rem;
    letter-spacing: -0.5px;
}

.section-subtitle {
    color: var(--clr-text-light);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ═══════════════════════════════════════════════════════════
   FEATURES SECTION
   ═══════════════════════════════════════════════════════════ */

.features-section {
    background: var(--clr-light);
}

.feature-card {
    background: var(--clr-white);
    border-radius: var(--card-radius);
    padding: 2.5rem 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid var(--clr-border);
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-card-hover);
    border-color: transparent;
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, rgba(67, 97, 238, 0.1), rgba(114, 9, 183, 0.1));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.8rem;
    color: var(--clr-primary);
    transition: all var(--transition-base);
}

.feature-card:hover .feature-icon {
    background: var(--gradient-primary);
    color: var(--clr-white);
    transform: scale(1.1);
}

.feature-card h5 {
    font-weight: 700;
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.feature-card p {
    color: var(--clr-text-light);
    font-size: 0.9rem;
    margin-bottom: 0;
    line-height: 1.7;
}

/* ═══════════════════════════════════════════════════════════
   CTA SECTION
   ═══════════════════════════════════════════════════════════ */

.cta-section {
    padding: 4rem 0;
}

.cta-card {
    background: var(--gradient-primary);
    border-radius: 20px;
    padding: 3.5rem;
    color: var(--clr-white);
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.cta-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
}

.cta-card::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 50%;
}

.cta-title {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: var(--clr-white);
}

.cta-text {
    font-size: 1.05rem;
    opacity: 0.85;
}

.cta-section .btn-light {
    background: var(--clr-white);
    color: var(--clr-primary);
    border: none;
    font-weight: 700;
    border-radius: var(--btn-radius);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
    z-index: 1;
}

.cta-section .btn-light:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* ═══════════════════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════════════════ */

.site-footer {
    background: var(--clr-dark);
    color: rgba(255, 255, 255, 0.7);
}

.footer-main {
    padding: 4rem 0 2rem;
}

.footer-brand .brand-icon {
    width: 36px;
    height: 36px;
    font-size: 1rem;
}

.footer-brand h5 {
    color: var(--clr-white);
    font-weight: 800;
}

.footer-about-text {
    font-size: 0.9rem;
    line-height: 1.8;
    opacity: 0.75;
}

.footer-heading {
    color: var(--clr-white);
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 1.25rem;
    position: relative;
    padding-bottom: 0.75rem;
}

.footer-heading::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--clr-primary);
    border-radius: 2px;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 0.6rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.65);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    display: inline-block;
}

.footer-links a:hover {
    color: var(--clr-accent);
    transform: translateX(3px);
}

.footer-contact {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-contact li {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    align-items: flex-start;
}

.footer-contact li i {
    color: var(--clr-primary);
    font-size: 1rem;
    margin-top: 3px;
    flex-shrink: 0;
}

.footer-contact a {
    color: rgba(255, 255, 255, 0.65);
    transition: color var(--transition-fast);
}

.footer-contact a:hover {
    color: var(--clr-accent);
}

/* Social Links */
.social-link {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.7);
    font-size: 1rem;
    transition: all var(--transition-base);
}

.social-link:hover {
    background: var(--clr-primary);
    color: var(--clr-white);
    transform: translateY(-3px);
}

.footer-bottom {
    padding: 1.25rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-bottom p {
    font-size: 0.85rem;
    opacity: 0.6;
}

/* ═══════════════════════════════════════════════════════════
   BUTTONS (Global Overrides)
   ═══════════════════════════════════════════════════════════ */

.btn {
    font-family: var(--font-primary);
    font-weight: 600;
    border-radius: var(--btn-radius);
    padding: 0.55rem 1.25rem;
    transition: all var(--transition-base);
    font-size: 0.9375rem;
    letter-spacing: 0.01em;
}

.btn-primary {
    background-color: var(--clr-primary);
    border-color: var(--clr-primary);
}

.btn-primary:hover {
    background-color: var(--clr-primary-dark);
    border-color: var(--clr-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-primary);
}

.btn-outline-primary {
    color: var(--clr-primary);
    border-color: var(--clr-primary);
}

.btn-outline-primary:hover {
    background-color: var(--clr-primary);
    border-color: var(--clr-primary);
    transform: translateY(-1px);
}

.btn-success {
    background-color: var(--clr-success);
    border-color: var(--clr-success);
}

.btn-danger {
    background-color: var(--clr-danger);
    border-color: var(--clr-danger);
}

.btn-warning {
    background-color: var(--clr-warning);
    border-color: var(--clr-warning);
    color: var(--clr-dark);
}

/* ═══════════════════════════════════════════════════════════
   CARDS (Global)
   ═══════════════════════════════════════════════════════════ */

.card {
    border: 1px solid var(--clr-border);
    border-radius: var(--card-radius);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

/* ═══════════════════════════════════════════════════════════
   BADGES (Global)
   ═══════════════════════════════════════════════════════════ */

.badge {
    font-weight: 600;
    font-size: 0.75rem;
    padding: 0.35em 0.75em;
    border-radius: 6px;
    letter-spacing: 0.02em;
}

.bg-success { background-color: var(--clr-success) !important; }
.bg-danger  { background-color: var(--clr-danger) !important; }
.bg-warning { background-color: var(--clr-warning) !important; color: var(--clr-dark) !important; }
.bg-info    { background-color: var(--clr-accent) !important; color: var(--clr-dark) !important; }
.bg-primary { background-color: var(--clr-primary) !important; }

/* ═══════════════════════════════════════════════════════════
   ALERTS (Global)
   ═══════════════════════════════════════════════════════════ */

.alert {
    border-radius: var(--card-radius);
    border: none;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.alert-success { background-color: rgba(6, 214, 160, 0.12); color: #047857; }
.alert-danger  { background-color: rgba(239, 71, 111, 0.12); color: #B91C1C; }
.alert-warning { background-color: rgba(255, 183, 3, 0.12); color: #92400E; }
.alert-info    { background-color: rgba(76, 201, 240, 0.12); color: #0E7490; }

/* ═══════════════════════════════════════════════════════════
   FORMS (Global)
   ═══════════════════════════════════════════════════════════ */

.form-control,
.form-select {
    font-family: var(--font-primary);
    border: 1.5px solid var(--clr-border);
    border-radius: var(--btn-radius);
    padding: 0.65rem 1rem;
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
    color: var(--clr-text);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--clr-primary);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
}

.form-label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--clr-text-heading);
    margin-bottom: 0.4rem;
}

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

.is-invalid {
    border-color: var(--clr-danger) !important;
}

.invalid-feedback {
    font-size: 0.8rem;
    color: var(--clr-danger);
}

/* ═══════════════════════════════════════════════════════════
   PAGINATION (Global)
   ═══════════════════════════════════════════════════════════ */

.page-link {
    color: var(--clr-primary);
    border: 1px solid var(--clr-border);
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.5rem 0.85rem;
    border-radius: var(--btn-radius) !important;
    margin: 0 2px;
    transition: all var(--transition-fast);
}

.page-link:hover {
    background-color: var(--clr-primary);
    border-color: var(--clr-primary);
    color: var(--clr-white);
}

.page-item.active .page-link {
    background-color: var(--clr-primary);
    border-color: var(--clr-primary);
}

/* ═══════════════════════════════════════════════════════════
   SCROLLBAR
   ═══════════════════════════════════════════════════════════ */

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--clr-light);
}

::-webkit-scrollbar-thumb {
    background: var(--clr-medium);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--clr-primary);
}

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════ */

@media (max-width: 991.98px) {
    :root {
        --section-padding: 4rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-stat {
        padding: 0 1rem;
    }

    .cta-card {
        padding: 2.5rem;
        text-align: center;
    }
}

@media (max-width: 575.98px) {
    :root {
        --section-padding: 3rem;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-stats {
        flex-direction: column;
        align-items: center;
    }

    .hero-stat {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        padding-bottom: 1rem;
        margin-bottom: 0.5rem;
    }

    .hero-stat:last-child {
        border-bottom: none;
    }

    .cta-card {
        padding: 2rem 1.5rem;
    }

    .footer-main {
        padding: 3rem 0 1.5rem;
    }
}

/* ═══════════════════════════════════════════════════════════
   ANIMATIONS (Utility)
   ═══════════════════════════════════════════════════════════ */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

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

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-fadeIn {
    animation: fadeIn 0.5s ease forwards;
}

.animate-scaleIn {
    animation: scaleIn 0.4s ease forwards;
}

/* Staggered animation delays */
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }