/* ===================== VARIABLES ===================== */
:root {
    --primary-color: #1e3a8a;
    --secondary-color: #3b82f6;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --text-lighter: #9ca3af;
    --bg-dark: #111827;
    --bg-darker: #0f172a;
    --bg-light: #f9fafb;
    --border-color: #e5e7eb;
    --border-dark: #374151;
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

/* ===================== FOOTER ===================== */
.footer {
    background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
    color: #d1d5db;
    position: relative;
    margin-top: auto;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===================== MAIN FOOTER CONTENT ===================== */
.footer-main {
    padding: 60px 20px 40px;
    border-bottom: 1px solid var(--border-dark);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

/* ===================== FOOTER COLUMNS ===================== */
.footer-col {
    animation: fadeInUp 0.6s ease-out;
}

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

/* ===================== FOOTER ABOUT ===================== */
.footer-about {
    display: flex;
    flex-direction: column;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.logo-image {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--accent-color);
    transition: var(--transition);
}

.footer-logo:hover .logo-image {
    transform: scale(1.1);
    box-shadow: 0 0 15px rgba(245, 158, 11, 0.4);
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.school-name {
    font-size: 18px;
    font-weight: 700;
    color: #ffffff;
    margin: 0;
    letter-spacing: 0.5px;
}

.school-tagline {
    font-size: 12px;
    color: var(--accent-color);
    font-weight: 600;
    letter-spacing: 0.5px;
}

.footer-description {
    font-size: 14px;
    line-height: 1.7;
    color: #d1d5db;
    margin-bottom: 24px;
}

/* ===================== FOOTER SOCIAL ===================== */
.footer-social {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 16px;
}

.social-link:hover {
    background: var(--accent-color);
    color: #ffffff;
    transform: translateY(-4px);
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

/* ===================== FOOTER TITLE ===================== */
.footer-title {
    font-size: 16px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-title i {
    color: var(--accent-color);
    font-size: 16px;
}

/* ===================== FOOTER LINKS ===================== */
.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links li {
    transition: var(--transition);
}

.footer-links a {
    color: #d1d5db;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    transition: var(--transition);
}

.footer-links a i {
    color: var(--accent-color);
    font-size: 12px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent-color);
    padding-left: 6px;
}

.footer-links a:hover i {
    transform: translateX(4px);
}

/* ===================== FOOTER CONTACT ===================== */
.footer-contact {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-contact li {
    display: flex;
    gap: 12px;
    transition: var(--transition);
}

.footer-contact li:hover {
    transform: translateX(4px);
}

.contact-icon {
    width: 40px;
    height: 40px;
    background: rgba(245, 158, 11, 0.1);
    color: var(--accent-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 16px;
    transition: var(--transition);
}

.footer-contact li:hover .contact-icon {
    background: var(--accent-color);
    color: #ffffff;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.contact-label {
    font-size: 12px;
    color: var(--text-lighter);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.contact-value {
    font-size: 14px;
    color: #d1d5db;
    line-height: 1.5;
    text-decoration: none;
    transition: var(--transition);
}

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

/* ===================== FOOTER BOTTOM ===================== */
.footer-bottom {
    background: rgba(0, 0, 0, 0.3);
    padding: 24px 20px;
    border-top: 1px solid var(--border-dark);
}

.footer-bottom-content {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 20px;
    align-items: center;
}

.footer-copyright p {
    font-size: 13px;
    color: #9ca3af;
    margin: 0;
}

.footer-copyright strong {
    color: var(--accent-color);
    font-weight: 700;
}

.footer-bottom-links {
    display: flex;
    align-items: center;
    gap: 12px;
    text-align: center;
}

.footer-bottom-links a {
    font-size: 12px;
    color: #9ca3af;
    text-decoration: none;
    transition: var(--transition);
}

.footer-bottom-links a:hover {
    color: var(--accent-color);
}

.divider {
    color: #4b5563;
}

.footer-credit {
    text-align: right;
}

.footer-credit p {
    font-size: 12px;
    color: #9ca3af;
    margin: 0;
}

.footer-credit i {
    color: #ef4444;
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% {
        transform: scale(1);
    }
    25% {
        transform: scale(1.2);
    }
    50% {
        transform: scale(1);
    }
}

/* ===================== BACK TO TOP BUTTON ===================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--secondary-color), #1d4ed8);
    color: #ffffff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 99;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:active {
    transform: translateY(-2px);
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }

    .footer-main {
        padding: 40px 20px 30px;
    }

    .footer-title {
        font-size: 14px;
    }

    .footer-links a,
    .contact-value,
    .footer-description {
        font-size: 13px;
    }

    .footer-bottom-content {
        grid-template-columns: 1fr;
        gap: 12px;
        text-align: center;
    }

    .footer-copyright,
    .footer-credit {
        text-align: center;
    }

    .footer-bottom-links {
        justify-content: center;
    }

    .back-to-top {
        width: 45px;
        height: 45px;
        bottom: 20px;
        right: 20px;
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .footer-main {
        padding: 30px 15px 20px;
    }

    .footer-title {
        font-size: 13px;
    }

    .footer-links a {
        font-size: 12px;
    }

    .footer-logo {
        margin-bottom: 12px;
    }

    .logo-image {
        width: 50px;
        height: 50px;
    }

    .school-name {
        font-size: 16px;
    }

    .footer-description {
        font-size: 12px;
        line-height: 1.6;
    }

    .footer-social {
        gap: 10px;
    }

    .social-link {
        width: 36px;
        height: 36px;
        font-size: 14px;
    }

    .footer-contact li {
        gap: 10px;
    }

    .contact-icon {
        width: 36px;
        height: 36px;
        font-size: 14px;
    }

    .contact-value {
        font-size: 12px;
    }

    .footer-bottom {
        padding: 16px 15px;
    }

    .footer-bottom-content {
        gap: 8px;
    }

    .footer-copyright p,
    .footer-credit p {
        font-size: 11px;
    }

    .footer-bottom-links {
        gap: 8px;
        font-size: 10px;
    }

    .back-to-top {
        width: 40px;
        height: 40px;
        bottom: 15px;
        right: 15px;
        font-size: 16px;
    }
}