/* css/style.css — Mobile-first responsive redesign
   Base styles target phones; min-width media queries enhance for
   tablet / laptop / desktop. */

/* ---------- Design tokens ---------- */
:root {
    --primary: #1a3a6c;
    --secondary: #e63946;
    --light: #f1faee;
    --accent: #a8dadc;
    --dark: #1d3557;
    --transition: all 0.3s ease;

    --nav-height: 64px;
    --max-width: 1200px;
    --radius: 12px;
    --space: 1.25rem;
}

/* ---------- Reset / base (mobile) ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height); /* offset sticky nav for anchors */
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
    overflow-x: clip; /* prevents horizontal scroll WITHOUT breaking position:sticky */
    width: 100%;
}

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

a {
    color: inherit;
}

/* Accessible, visible focus state on touch/keyboard */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ---------- Navigation (mobile base) ---------- */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem var(--space);
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
    min-height: var(--nav-height);
}

.logo {
    display: flex;
    align-items: center;
    min-width: 0; /* allow text to truncate instead of overflow */
    text-decoration: none;
}

.logo img {
    height: 40px;
    width: auto;
    margin-right: 10px;
    flex-shrink: 0;
}

.logo span,
.logo-text {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--dark);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Desktop links hidden on phones by default */
.nav-links {
    display: none;
}

.mobile-menu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--dark);
    flex-shrink: 0;
}

/* ---------- Mobile slide-down menu ---------- */
.mobile-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.12);
    transform: translateY(-130%);
    transition: transform 0.35s ease;
    z-index: 99;
    max-height: calc(100vh - var(--nav-height));
    overflow-y: auto;
}

.mobile-menu.active {
    transform: translateY(0);
}

.mobile-nav-links {
    list-style: none;
}

.mobile-nav-links li a {
    display: block;
    padding: 1rem 1.5rem;
    text-decoration: none;
    color: var(--dark);
    border-bottom: 1px solid #eee;
    font-weight: 500;
    transition: var(--transition);
}

.mobile-nav-links li a:hover,
.mobile-nav-links li a.active {
    background-color: var(--primary);
    color: #fff;
}

/* ---------- Buttons (mobile base: full-width tap targets) ---------- */
.btn {
    display: block;
    width: 100%;
    padding: 14px 24px;
    background-color: var(--secondary);
    color: #fff;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 700;
    font-size: 1rem;
    border: 2px solid var(--secondary);
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.18);
}

.btn-secondary {
    background-color: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

/* ---------- Hero (mobile base) ---------- */
.hero {
    display: flex;
    align-items: center;
    text-align: center;
    color: #fff;
    padding: 4.5rem var(--space);
    min-height: 80vh;
    background: linear-gradient(rgba(26, 58, 108, 0.82), rgba(29, 53, 87, 0.88)),
                url('https://images.unsplash.com/photo-1523240795612-9a054b0db644?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1920&q=80') center/cover;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-content h1 {
    font-size: clamp(1.7rem, 7vw, 2.5rem);
    margin-bottom: 1rem;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
    line-height: 1.2;
}

.hero-content p {
    font-size: clamp(1rem, 3.6vw, 1.2rem);
    margin-bottom: 1.5rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    margin-top: 1.75rem;
}

/* ---------- Section titles ---------- */
.section-title {
    text-align: center;
    margin: 2.5rem 0;
    color: var(--primary);
    position: relative;
    font-size: clamp(1.4rem, 5vw, 2rem);
    padding: 0 var(--space);
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--secondary);
    margin: 12px auto 0;
    border-radius: 2px;
}

/* ---------- Features (mobile: stacked) ---------- */
.features {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 20px;
    padding: 0 var(--space) 3rem;
}

.feature-card {
    width: 100%;
    padding: 28px 22px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 26px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 2.75rem;
    color: var(--primary);
    margin-bottom: 18px;
}

.feature-card h3 {
    margin-bottom: 12px;
    color: var(--dark);
    font-size: 1.2rem;
}

/* ---------- Testimonials ---------- */
.testimonials {
    background-color: var(--light);
    padding: 3rem var(--space);
    text-align: center;
}

.testimonial-container {
    max-width: 800px;
    margin: 0 auto;
}

.testimonial {
    padding: 28px 22px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    margin: 0 0 18px;
    position: relative;
}

.testimonial-text {
    font-style: italic;
    margin-bottom: 18px;
    position: relative;
}

.testimonial-text::before,
.testimonial-text::after {
    content: '"';
    font-size: 3rem;
    color: var(--accent);
    position: absolute;
    opacity: 0.3;
    line-height: 1;
}

.testimonial-text::before {
    top: -18px;
    left: -8px;
}

.testimonial-text::after {
    bottom: -32px;
    right: -8px;
}

.testimonial-author {
    font-weight: 700;
    color: var(--primary);
}

.testimonial-role {
    font-size: 0.9rem;
    color: #666;
}

/* ---------- Universities ---------- */
.universities {
    padding: 3rem var(--space);
    text-align: center;
}

.university-logos {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 30px;
}

.university-logo {
    width: clamp(110px, 30vw, 150px);
    height: clamp(110px, 30vw, 150px);
    background: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    padding: 14px;
}

.university-logo:hover {
    transform: scale(1.06);
}

.university-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

/* ---------- Page heroes (mentorship / resources / donate / about) ---------- */
.mentorship-hero,
.resources-hero,
.donate-hero,
.about-hero {
    display: flex;
    align-items: center;
    text-align: center;
    color: #fff;
    padding: 4.5rem var(--space);
    min-height: 60vh;
}

.mentorship-hero {
    background: linear-gradient(rgba(26, 58, 108, 0.85)),
                url('https://images.unsplash.com/photo-1523580494863-6f3031224c94?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1920&q=80') center/cover;
}

.resources-hero {
    background: linear-gradient(rgba(26, 58, 108, 0.85)),
                url('https://images.unsplash.com/photo-1497633762265-9d179a990aa6?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1920&q=80') center/cover;
}

.donate-hero {
    background: linear-gradient(rgba(26, 58, 108, 0.85)),
                url('https://images.unsplash.com/photo-1516321497487-e288fb19713f?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1920&q=80') center/cover;
}

.about-hero {
    background: linear-gradient(rgba(26, 58, 108, 0.85)),
                url('https://images.unsplash.com/photo-1523050854058-8df90110c9f1?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1920&q=80') center/cover;
}

.mentorship-hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.mentorship-hero-content h1 {
    font-size: clamp(1.7rem, 7vw, 2.5rem);
    margin-bottom: 1rem;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
    line-height: 1.2;
}

.mentorship-hero-content p {
    font-size: clamp(1rem, 3.6vw, 1.2rem);
    margin-bottom: 1.5rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* ---------- How it works (steps) ---------- */
.how-it-works {
    padding: 3rem var(--space);
    background-color: var(--light);
}

.steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.step-card {
    padding: 28px 22px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.step-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 26px rgba(0, 0, 0, 0.1);
}

.step-number {
    position: absolute;
    top: 12px;
    left: 14px;
    font-size: 2.5rem;
    font-weight: 700;
    color: rgba(26, 58, 108, 0.1);
    line-height: 1;
}

.step-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 16px;
}

.step-card h3 {
    margin-bottom: 12px;
    color: var(--dark);
    font-size: 1.2rem;
}

/* ---------- Mentor profiles ---------- */
.mentor-profiles {
    padding: 3rem var(--space);
}

.mentor-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 32px;
}

.filter-btn {
    padding: 10px 18px;
    min-height: 44px;
    background: #fff;
    border: 1px solid var(--accent);
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
}

.filter-btn.active,
.filter-btn:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.mentor-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 22px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.mentor-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.mentor-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 26px rgba(0, 0, 0, 0.1);
}

.mentor-header {
    background: var(--primary);
    color: #fff;
    padding: 22px 18px;
    text-align: center;
}

.mentor-avatar {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    border: 3px solid #fff;
    margin: 0 auto 14px;
    background: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.25rem;
    color: #fff;
}

.mentor-name {
    font-size: 1.3rem;
    margin-bottom: 4px;
}

.mentor-university {
    font-size: 0.9rem;
    opacity: 0.9;
}

.mentor-body {
    padding: 20px;
}

.mentor-details {
    margin-bottom: 14px;
}

.mentor-detail {
    display: flex;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.mentor-detail i {
    color: var(--primary);
    min-width: 25px;
    margin-right: 8px;
    text-align: center;
}

.mentor-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
}

.skill-tag {
    background: var(--accent);
    color: var(--dark);
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
}

.mentor-actions {
    padding: 16px 20px;
    background: rgba(168, 218, 220, 0.1);
    text-align: center;
}

/* ---------- Become a mentor ---------- */
.become-mentor {
    padding: 3.5rem var(--space);
    background: linear-gradient(rgba(26, 58, 108, 0.9), rgba(26, 58, 108, 0.9)),
                url('https://images.unsplash.com/photo-1543269865-cbf427effbad?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1920&q=80') center/cover;
    color: #fff;
    text-align: center;
}

.become-mentor-content {
    max-width: 800px;
    margin: 0 auto;
}

.become-mentor h2 {
    margin-bottom: 1.25rem;
    font-size: clamp(1.6rem, 5vw, 2.2rem);
}

.become-mentor p {
    margin-bottom: 1.75rem;
    font-size: 1.05rem;
}

/* ---------- Resources ---------- */
.resource-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin: 32px auto;
    max-width: var(--max-width);
    padding: 0 var(--space);
}

.resource-tab {
    padding: 11px 20px;
    min-height: 44px;
    background: #fff;
    border: 1px solid var(--accent);
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    font-size: 0.95rem;
}

.resource-tab.active,
.resource-tab:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.resource-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 22px;
    max-width: var(--max-width);
    margin: 0 auto 3rem;
    padding: 0 var(--space);
}

.resource-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.resource-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 26px rgba(0, 0, 0, 0.1);
}

.resource-header {
    background: var(--primary);
    color: #fff;
    padding: 22px 18px;
    text-align: center;
}

.resource-icon {
    font-size: 2.25rem;
    margin-bottom: 12px;
}

.resource-body {
    padding: 20px;
    flex: 1;
}

.resource-body h3 {
    margin-bottom: 12px;
    color: var(--dark);
}

.resource-list {
    list-style: none;
    margin: 14px 0;
}

.resource-list li {
    margin-bottom: 10px;
    padding-left: 25px;
    position: relative;
}

.resource-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: 700;
}

.resource-actions {
    padding: 15px 20px;
    text-align: center;
    border-top: 1px solid #eee;
}

/* University map */
.university-map {
    max-width: 1000px;
    margin: 40px auto;
    padding: 0 var(--space);
}

.map-container {
    background: #fff;
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.map-title {
    text-align: center;
    margin-bottom: 18px;
    color: var(--primary);
    font-size: 1.3rem;
}

.map-iframe {
    width: 100%;
    height: 320px;
    border: none;
    border-radius: 8px;
    overflow: hidden;
    background: #e5e5e5;
}

/* Leaflet: keep the map inside its own stacking context so its
   internal panes (high z-index) don't paint over the sticky navbar
   or the mobile menu. */
.leaflet-container {
    z-index: 1;
}

/* ---------- Donate ---------- */
.impact-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin: 32px auto;
    max-width: 1000px;
    padding: 0 var(--space);
}

.stat-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 24px 16px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-6px);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 8px;
    line-height: 1.1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--dark);
    font-weight: 500;
}

.donation-options {
    max-width: 1000px;
    margin: 32px auto;
    padding: 0 var(--space);
}

.donation-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 22px;
    margin-bottom: 48px;
}

.donation-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    text-align: center;
    padding: 28px 22px;
}

.donation-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 26px rgba(0, 0, 0, 0.1);
}

.donation-icon {
    font-size: 2.75rem;
    color: var(--primary);
    margin-bottom: 16px;
}

.donation-form-container {
    max-width: 600px;
    margin: 0 auto 48px;
    padding: 28px 22px;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 13px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    background: #fff;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(26, 58, 108, 0.12);
}

.donate-btn {
    display: block;
    width: 100%;
    padding: 15px;
    background-color: var(--secondary);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
}

.donate-btn:hover {
    background-color: #c1121f;
    transform: translateY(-3px);
}

.success-stories {
    max-width: 1000px;
    margin: 0 auto 48px;
    padding: 0 var(--space);
}

.story-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    margin-bottom: 26px;
    display: flex;
    flex-direction: column;
}

.story-image {
    width: 100%;
    min-height: 220px;
    background-size: cover;
    background-position: center;
}

.story-content {
    padding: 26px 22px;
    flex: 1;
}

.story-content h3 {
    color: var(--primary);
    margin-bottom: 12px;
    font-size: 1.2rem;
}

.story-content .quote {
    font-style: italic;
    margin: 18px 0;
    padding-left: 18px;
    border-left: 3px solid var(--accent);
}

/* ---------- About / team / timeline ---------- */
.mission-section {
    max-width: 1000px;
    margin: 48px auto;
    padding: 0 var(--space);
    text-align: center;
}

.mission-section p {
    margin-bottom: 1rem;
}

.team-section {
    max-width: var(--max-width);
    margin: 48px auto;
    padding: 0 var(--space);
}

.team-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 22px;
    margin-top: 32px;
}

.team-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    text-align: center;
}

.team-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 26px rgba(0, 0, 0, 0.1);
}

.team-image {
    height: 240px;
    background-size: cover;
    background-position: center;
}

.team-content {
    padding: 20px;
}

.team-name {
    color: var(--primary);
    margin-bottom: 4px;
    font-size: 1.2rem;
}

.team-role {
    color: var(--secondary);
    margin-bottom: 12px;
    font-weight: 500;
}

.school-history {
    background-color: var(--light);
    padding: 48px var(--space);
}

.history-container {
    max-width: 1000px;
    margin: 0 auto;
}

.history-container > p {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

/* Timeline — mobile: single left-aligned rail (base) */
.history-timeline {
    position: relative;
    max-width: 800px;
    margin: 36px auto 0;
}

.history-timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 20px;
    width: 4px;
    background: var(--accent);
}

.timeline-item {
    position: relative;
    margin-bottom: 26px;
    padding-left: 52px;
    padding-right: 0;
}

.timeline-content {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 22px;
    left: -40px;
    width: 20px;
    height: 20px;
    background: var(--primary);
    border: 4px solid #fff;
    border-radius: 50%;
}

.timeline-year {
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 8px;
}

.about-partners-section {
    max-width: var(--max-width);
    margin: 48px auto;
    padding: 0 var(--space);
    text-align: center;
}

.about-partner-logos {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 32px;
}

.about-partner-logo {
    height: auto;
    min-height: 90px;
    background: #fff;
    padding: 14px 18px;
    border-radius: 8px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-partner-logo img {
    max-height: 60px;
    max-width: 140px;
    object-fit: contain;
}

/* ---------- Footer ---------- */
footer {
    background-color: var(--dark);
    color: #fff;
    padding: 2.5rem var(--space) 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
    margin-bottom: 1.5rem;
}

.footer-section {
    padding: 6px 0;
}

.footer-section h4 {
    margin-bottom: 14px;
    position: relative;
    padding-bottom: 8px;
    font-size: 1.15rem;
}

.footer-section h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--secondary);
}

.contact-info p {
    margin-bottom: 8px;
    display: flex;
    align-items: flex-start;
    font-size: 0.95rem;
}

.contact-info i {
    margin-right: 10px;
    color: var(--accent);
    min-width: 20px;
    text-align: center;
    margin-top: 4px;
}

.social-icons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 14px;
}

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

.social-icon:hover {
    background: var(--secondary);
    transform: translateY(-3px);
}

.partner-logos {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 14px;
    align-items: center;
}

.partner-logo {
    height: 46px;
    border-radius: 4px;
    object-fit: contain;
    background: transparent;
    padding: 0;
}

.footer-bottom {
    text-align: center;
    padding-top: 14px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    margin-top: 10px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ---------- 404 page ---------- */
.error-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 78vh;
    padding: 40px var(--space);
    text-align: center;
}

.error-code {
    font-size: clamp(5rem, 22vw, 8rem);
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 18px;
    position: relative;
}

.error-code::after {
    content: '404';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -60%);
    color: rgba(26, 58, 108, 0.1);
    z-index: -1;
    font-size: clamp(7rem, 30vw, 14rem);
    white-space: nowrap;
}

.error-title {
    font-size: clamp(1.6rem, 6vw, 2.5rem);
    color: var(--dark);
    margin-bottom: 16px;
}

.error-message {
    font-size: 1rem;
    color: #555;
    max-width: 600px;
    margin-bottom: 32px;
    line-height: 1.6;
}

.error-illustration {
    max-width: 360px;
    margin: 32px auto;
}

.error-illustration svg {
    width: 100%;
    height: auto;
}

.error-actions {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
    margin-top: 24px;
    width: 100%;
    max-width: 320px;
}

.error-btn {
    display: block;
    padding: 14px 28px;
    background-color: var(--primary);
    color: #fff;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 700;
    transition: var(--transition);
    border: 2px solid var(--primary);
    text-align: center;
}

.error-btn:hover {
    background-color: transparent;
    color: var(--primary);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.error-btn.secondary {
    background-color: var(--secondary);
    border-color: var(--secondary);
}

.error-btn.secondary:hover {
    background-color: transparent;
    color: var(--secondary);
}

/* =========================================================
   ENHANCEMENTS — tablet and up
   ========================================================= */

/* Small tablets / large phones (≥ 480px) */
@media (min-width: 480px) {
    :root {
        --space: 1.5rem;
    }

    .features {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }

    .feature-card {
        flex: 1 1 260px;
        max-width: 360px;
    }

    .impact-stats {
        gap: 20px;
    }
}

/* Tablets (≥ 640px) — multi-column grids begin */
@media (min-width: 640px) {
    .resource-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .mentor-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .donation-cards {
        grid-template-columns: repeat(3, 1fr);
    }

    .steps {
        grid-template-columns: repeat(3, 1fr);
    }

    .map-iframe {
        height: 440px;
    }
}

/* Laptops (≥ 768px) — desktop nav, side-by-side layouts */
@media (min-width: 768px) {
    :root {
        --nav-height: 72px;
        --space: 2rem;
    }

    .logo img {
        height: 50px;
        margin-right: 15px;
    }

    .logo span,
    .logo-text {
        font-size: 1.2rem;
    }

    /* Show desktop nav, hide hamburger + slide menu */
    .nav-links {
        display: flex;
        list-style: none;
    }

    .nav-links li a {
        text-decoration: none;
        color: var(--dark);
        padding: 0.5rem 1rem;
        margin: 0 5px;
        border-radius: 4px;
        transition: var(--transition);
        font-weight: 500;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
        background-color: var(--primary);
        color: #fff;
    }

    .mobile-menu-btn {
        display: none;
    }

    .mobile-menu {
        display: none;
    }

    /* Hero buttons side by side */
    .cta-buttons {
        flex-direction: row;
        justify-content: center;
        align-items: center;
    }

    .btn {
        width: auto;
        min-width: 200px;
    }

    .section-title {
        margin: 3rem 0;
    }

    .feature-card {
        max-width: 350px;
    }

    /* 3-up mentors on wider laptops */
    .mentor-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .testimonials {
        padding: 5rem var(--space);
    }

    .testimonial {
        margin: 20px;
        padding: 30px;
    }

    .universities {
        padding: 5rem var(--space);
    }

    .mentorship-hero,
    .resources-hero,
    .donate-hero,
    .about-hero {
        min-height: 60vh;
        padding: 5rem 10%;
    }

    .how-it-works {
        padding: 5rem var(--space);
    }

    .mentor-profiles {
        padding: 5rem var(--space);
    }

    .become-mentor {
        padding: 5rem var(--space);
    }

    .footer-content {
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
    }

    .footer-section {
        padding: 10px 0;
    }

    /* Donate success stories side by side */
    .story-card {
        flex-direction: row;
    }

    .story-image {
        flex: 1 1 42%;
        min-height: 320px;
    }

    .story-content {
        flex: 1 1 58%;
    }

    /* Desktop alternating timeline */
    .history-timeline::before {
        left: 50%;
        margin-left: -2px;
    }

    .timeline-item {
        width: 50%;
        padding-left: 0;
        padding-right: 40px;
        margin-bottom: 40px;
    }

    .timeline-item:nth-child(even) {
        margin-left: 50%;
        padding-right: 0;
        padding-left: 40px;
    }

    .timeline-content::before {
        left: auto;
        right: -50px;
    }

    .timeline-item:nth-child(even) .timeline-content::before {
        right: auto;
        left: -50px;
    }

    .timeline-item:nth-child(odd) .timeline-content {
        text-align: right;
    }

    /* Error actions row */
    .error-actions {
        flex-direction: row;
        justify-content: center;
        max-width: none;
    }

    .error-btn {
        min-width: 220px;
    }
}

/* Large laptops / desktops (≥ 992px) */
@media (min-width: 992px) {
    .hero {
        min-height: 80vh;
        padding: 0 10%;
    }

    .resource-cards {
        grid-template-columns: repeat(3, 1fr);
    }

    .team-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Very large screens (≥ 1200px) */
@media (min-width: 1200px) {
    .mentor-grid,
    .resource-cards,
    .team-grid,
    .donation-cards {
        gap: 30px;
    }
}

/* ---------- Application modal (Discord apply) ---------- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space);
    z-index: 300;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: #fff;
    border-radius: var(--radius);
    max-width: 460px;
    width: 100%;
    padding: 30px 24px 28px;
    text-align: center;
    position: relative;
    transform: translateY(12px);
    transition: transform 0.25s ease;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal h3 {
    color: var(--primary);
    margin-bottom: 12px;
    font-size: 1.35rem;
}

.modal p {
    margin-bottom: 22px;
    color: #444;
    font-size: 1rem;
}

.modal .btn {
    width: 100%;
}

.modal-close {
    position: absolute;
    top: 10px;
    right: 14px;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    font-size: 1.8rem;
    line-height: 1;
    color: #888;
    cursor: pointer;
    border-radius: 50%;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--dark);
    background: #f0f0f0;
}

/* ---------- Form validation ---------- */
.form-errors {
    display: none;
    background: #fdecea;
    border: 1px solid #f5c2c0;
    color: #b71c1c;
    border-radius: 8px;
    padding: 12px 16px;
    margin-bottom: 18px;
    font-size: 0.92rem;
}

.form-errors.show {
    display: block;
}

.form-errors ul {
    margin: 0;
    padding-left: 18px;
}

.form-group input.invalid,
.form-group select.invalid {
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.15);
}

/* Outlined secondary button (for light backgrounds like modals) */
.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
}

/* ---------- Payment slip (uplatnica) ---------- */
.slip-modal {
    max-width: 520px;
}

.uplatnica {
    border: 2px solid var(--dark);
    border-radius: 8px;
    overflow: hidden;
    text-align: left;
    font-size: 0.85rem;
    margin-bottom: 18px;
}

.uplatnica-header {
    background: var(--dark);
    color: #fff;
    text-align: center;
    font-weight: 700;
    letter-spacing: 1px;
    padding: 10px;
}

.uplatnica-row {
    display: flex;
    border-bottom: 1px solid #ccc;
}

.u-field {
    padding: 10px 12px;
    border-right: 1px solid #ccc;
    flex: 1;
    min-width: 0;
}

.u-field:last-child {
    border-right: none;
}

.u-field label {
    display: block;
    font-size: 0.62rem;
    font-weight: 700;
    color: #555;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.u-value {
    font-weight: 600;
    color: var(--dark);
    word-break: break-word;
    white-space: pre-line;
}

.uplatnica-footer {
    padding: 10px 12px;
    font-size: 0.72rem;
    color: #666;
}

.slip-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

@media (min-width: 480px) {
    .slip-actions {
        flex-direction: row;
    }

    .slip-actions .btn {
        flex: 1;
    }
}

/* Print only the payment slip.
   The previous approach used `visibility:hidden` on body content, which
   kept the invisible page in the layout and produced blank trailing pages.
   We instead drop every body child except the slip from the layout entirely,
   so the printout is a single page with just the uplatnica. */
@media print {
    body > *:not(.slip-overlay) {
        display: none !important;
    }

    .slip-overlay {
        position: static !important;
        display: block !important;
        inset: auto;
        background: #fff !important;
        padding: 0 !important;
        overflow: visible !important;
    }

    .slip-modal {
        max-width: 100% !important;
        box-shadow: none !important;
        padding: 0 !important;
        margin: 0 !important;
    }

    .slip-modal .modal-close,
    .slip-actions {
        display: none !important;
    }
}

/* Respect reduced-motion preference */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        transition: none !important;
        animation: none !important;
        scroll-behavior: auto !important;
    }
}