/* ============================================================
   NSHUTI EMMANUEL — Web Dev Practical | Responsive Style
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Sans:ital,wght@0,300;0,400;0,500;1,400&display=swap');

@font-face {
  font-family: "Times New Roman";
  src: url('fonts/times-new-roman.woff2') format('woff2'),
       url('fonts/times-new-roman.woff') format('woff');
  /* Add other formats for broad browser support */
}

/* ===== CSS VARIABLES ===== */
:root {
    --clr-bg:          #f0f4f8;
    --clr-surface:     #ffffff;
    --clr-surface-alt: #eef2f7;
    --clr-text:        #1e293b;
    --clr-text-muted:  #64748b;
    --clr-accent-1:    #2563eb;
    --clr-accent-2:    #0ea5e9;
    --clr-accent-3:    #10b981;
    --clr-header-bg:   #0f172a;
    --clr-footer-bg:   #0f172a;
    --gradient-accent: linear-gradient(135deg, var(--clr-accent-1), var(--clr-accent-3));
    --gradient-hero:   linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
    --shadow-sm:       0 2px 8px rgba(0,0,0,0.08);
    --shadow-md:       0 8px 24px rgba(0,0,0,0.10);
    --shadow-lg:       0 20px 48px rgba(0,0,0,0.14);
    --radius-sm:       10px;
    --radius-md:       18px;
    --radius-lg:       28px;
    --radius-pill:     999px;
    --transition:      0.3s ease;
    --font-display:    'Times New Roman', serif;
    --font-body:       'Times New Roman', serif;
    --header-height:   72px;
}

/* ===== DARK MODE VARIABLES ===== */
body.dark-mode {
    --clr-bg:          #060c18;
    --clr-surface:     #0f1e2e;
    --clr-surface-alt: #162032;
    --clr-text:        #e2e8f0;
    --clr-text-muted:  #94a3b8;
    --clr-header-bg:   #060c18;
    --clr-footer-bg:   #060c18;
    --shadow-md:       0 8px 24px rgba(0,0,0,0.4);
    --shadow-lg:       0 20px 48px rgba(0,0,0,0.5);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background-color: var(--clr-bg);
    color: var(--clr-text);
    line-height: 1.7;
    transition: background-color var(--transition), color var(--transition);
    min-height: 100vh;
    overflow-x: hidden;
}

.page-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ===== CONTAINER ===== */
.container {
    width: 100%;
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 clamp(16px, 5vw, 40px);
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3 {
    font-family: var(--font-display);
    color: var(--clr-text);
    line-height: 1.2;
    transition: color var(--transition);
}

h1 { font-size: clamp(1.5rem, 4vw, 2.2rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); }

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

a { color: var(--clr-accent-1); }

/* ===== SECTION TITLE ===== */
.section-title {
    text-align: center;
    margin-bottom: 2.5rem;
}
.section-title h2 {
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    margin-bottom: 0.6rem;
}
.title-underline {
    width: 70px;
    height: 4px;
    background: var(--gradient-accent);
    margin: 0 auto;
    border-radius: var(--radius-pill);
}

/* ===== SECTION SPACING ===== */
main > section {
    padding: clamp(40px, 7vw, 80px) 0;
}

/* ===== CARD ===== */
.card {
    background: var(--clr-surface);
    border-radius: var(--radius-md);
    padding: clamp(20px, 4vw, 32px);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition);
}
.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* ===== HEADER ===== */
header {
    background: var(--clr-header-bg);
    color: white;
    position: sticky;
    top: 14px;
    z-index: 100;
    border-radius: var(--radius-pill);
    margin: 14px clamp(12px, 3vw, 28px);
    padding: 0 clamp(16px, 3vw, 30px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.3), 0 0 0 1px rgba(255,255,255,0.05);
    transition: background-color var(--transition), box-shadow var(--transition);
    height: var(--header-height);
    display: flex;
    align-items: center;
}

header:hover {
    box-shadow: 0 10px 40px rgba(37, 99, 235, 0.3), 0 0 0 1px rgba(255,255,255,0.08);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    gap: 16px;
}

#mainTitle {
    font-family: var(--font-display);
    font-size: clamp(1.1rem, 3vw, 1.6rem);
    font-weight: 800;
    color: #fff;
    white-space: nowrap;
    letter-spacing: -0.02em;
}

/* ===== HAMBURGER MENU ===== */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: background var(--transition);
    box-shadow: none;
}
.hamburger:hover {
    background: rgba(255,255,255,0.1);
    transform: none;
    box-shadow: none;
}
.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: white;
    border-radius: 2px;
    transition: transform 0.35s ease, opacity 0.25s ease;
    transform-origin: center;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== NAV ===== */
nav {
    display: flex;
    align-items: center;
    gap: 12px;
}

.menu {
    list-style: none;
    display: flex;
    gap: 6px;
    align-items: center;
}

.menu li a {
    display: block;
    color: rgba(255,255,255,0.85);
    padding: 8px 18px;
    text-decoration: none;
    border-radius: var(--radius-pill);
    font-weight: 500;
    font-size: 0.95rem;
    transition: background var(--transition), color var(--transition), transform 0.2s;
    white-space: nowrap;
}
.menu li a:hover {
    background: var(--gradient-accent);
    color: #fff;
    transform: scale(1.04);
}

/* Header dark mode button */
header #darkModeBtn {
    padding: 7px 16px;
    font-size: 0.85rem;
    white-space: nowrap;
}

/* ===== HERO SECTION ===== */
.hero { margin: 0; padding: clamp(30px, 5vw, 60px) 0 !important; }

.hero-card {
    background: var(--gradient-hero);
    color: white;
    border-radius: var(--radius-lg);
    padding: clamp(36px, 7vw, 70px) clamp(24px, 6vw, 64px);
    text-align: center;
    box-shadow: 0 24px 64px rgba(0,0,0,0.25);
    position: relative;
    overflow: hidden;
}
.hero-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 20% 50%, rgba(37,99,235,0.25) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 20%, rgba(16,185,129,0.2) 0%, transparent 55%);
    pointer-events: none;
}
.hero-card h2 {
    font-family: var(--font-display);
    color: white;
    font-size: clamp(1.6rem, 5vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}
.hero-card p { color: rgba(255,255,255,0.75); font-size: clamp(0.95rem, 1.5vw, 1.1rem); }
.hero-card hr {
    border: none;
    border-top: 1px solid rgba(255,255,255,0.2);
    width: 60%;
    margin: 1.5rem auto;
}

/* ===== ABOUT SECTION ===== */
.about-content p { font-size: 1.05rem; }
.about-content hr {
    border: none;
    border-top: 2px solid var(--clr-surface-alt);
    margin: 1.2rem 0;
}
body.dark-mode .about-content hr { border-color: rgba(255,255,255,0.08); }

/* ===== FAVORITES GRID ===== */
.favorites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
    gap: clamp(16px, 3vw, 28px);
}
.favorites-grid h3 {
    color: var(--clr-accent-1);
    border-bottom: 2px solid var(--clr-surface-alt);
    padding-bottom: 10px;
    margin-bottom: 14px;
    font-size: 1.15rem;
}
body.dark-mode .favorites-grid h3 { border-color: rgba(255,255,255,0.08); }

.favorites-grid ul, .favorites-grid ol { padding-left: 20px; }
.favorites-grid li { margin-bottom: 8px; }
.favorites-grid a {
    color: var(--clr-accent-3);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition);
}
.favorites-grid a:hover { text-decoration: underline; color: var(--clr-accent-1); }

/* ===== TABLE ===== */
#marksSection { padding: clamp(30px, 5vw, 60px) 0 !important; }

.table-wrapper { overflow-x: auto; -webkit-overflow-scrolling: touch; }

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 360px;
    background: var(--clr-surface);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: background-color var(--transition);
}
th, td {
    padding: clamp(10px, 2vw, 16px) clamp(12px, 2.5vw, 20px);
    text-align: left;
    border-bottom: 1px solid var(--clr-surface-alt);
    font-size: clamp(0.85rem, 1.5vw, 1rem);
    transition: background-color var(--transition), border-color var(--transition);
}
th {
    background: var(--gradient-accent);
    color: white;
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: 0.02em;
}
tr:nth-child(even) { background-color: var(--clr-surface-alt); }
tr:hover { background-color: rgba(37,99,235,0.07); }
body.dark-mode tr:nth-child(even) { background-color: rgba(255,255,255,0.04); }
body.dark-mode tr:hover { background-color: rgba(37,99,235,0.12); }
body.dark-mode td { border-color: rgba(255,255,255,0.06); color: var(--clr-text); }

/* ===== MEDIA GRID ===== */
.media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
    gap: clamp(16px, 3vw, 28px);
}
.media-card { text-align: center; }
.media-card figure { margin: 0; }
.media-card img, .media-card video {
    width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    display: block;
}
.media-card figcaption {
    margin-top: 10px;
    font-style: italic;
    color: var(--clr-text-muted);
    font-size: 0.9rem;
}

/* ===== INTERACTIVE FEATURES ===== */
#interactive-features { padding: clamp(30px, 5vw, 60px) 0 !important; }

.features-wrapper {
    background: var(--clr-surface);
}
.feature-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: clamp(8px, 2vw, 14px);
    margin-bottom: 20px;
}
.feature-output {
    background: var(--clr-surface-alt);
    padding: clamp(16px, 3vw, 24px);
    border-radius: var(--radius-sm);
    text-align: center;
    min-height: 90px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    transition: background-color var(--transition);
}
#greeting {
    font-size: clamp(1rem, 2.5vw, 1.4rem);
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--clr-text);
    margin: 0;
    transition: color var(--transition);
}
#dateTimeDisplay {
    color: var(--clr-text-muted);
    font-family: 'Courier New', monospace;
    font-size: clamp(0.8rem, 1.5vw, 0.95rem);
    transition: color var(--transition);
}

/* ===== BUTTONS ===== */
button {
    font-family: var(--font-body);
    background: var(--gradient-accent);
    border: none;
    color: white;
    padding: clamp(9px, 1.5vw, 12px) clamp(16px, 3vw, 24px);
    font-size: clamp(0.85rem, 1.5vw, 0.98rem);
    border-radius: var(--radius-pill);
    cursor: pointer;
    font-weight: 500;
    box-shadow: 0 4px 14px rgba(37,99,235,0.3);
    transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s;
    white-space: nowrap;
}
button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(37,99,235,0.4);
}
button:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(37,99,235,0.25);
}

/* ===== CONTACT FORM ===== */
.contact-section { padding: clamp(40px, 7vw, 80px) 0 !important; }

.form-wrapper {
    max-width: 580px;
    margin: 0 auto;
}
.form-group { margin-bottom: 1.4rem; }

label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 0.92rem;
    color: var(--clr-text);
    transition: color var(--transition);
}
input[type=text],
input[type=email],
textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--clr-surface-alt);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 1rem;
    background: var(--clr-bg);
    color: var(--clr-text);
    transition: border-color var(--transition), box-shadow var(--transition),
                background-color var(--transition), color var(--transition);
}
input:focus, textarea:focus {
    outline: none;
    border-color: var(--clr-accent-1);
    box-shadow: 0 0 0 4px rgba(37,99,235,0.15);
}
body.dark-mode input[type=text],
body.dark-mode input[type=email],
body.dark-mode textarea {
    background: var(--clr-surface-alt);
    border-color: rgba(255,255,255,0.1);
    color: var(--clr-text);
}
body.dark-mode input:focus,
body.dark-mode textarea:focus {
    border-color: var(--clr-accent-2);
    box-shadow: 0 0 0 4px rgba(14,165,233,0.2);
}

/* ===== FOOTER ===== */
footer {
    background: var(--clr-footer-bg);
    color: rgba(255,255,255,0.7);
    border-radius: var(--radius-pill);
    margin: 16px clamp(12px, 3vw, 28px);
    padding: 18px clamp(16px, 4vw, 32px);
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    transition: background-color var(--transition), box-shadow var(--transition);
    margin-top: auto;
}
footer:hover {
    box-shadow: 0 8px 32px rgba(37,99,235,0.25);
}
.footer-content p { margin: 0; font-size: 0.9rem; }

/* ===== DARK MODE OVERRIDES ===== */
body.dark-mode .card {
    background: var(--clr-surface);
    box-shadow: var(--shadow-md);
}
body.dark-mode .hero-card {
    background: linear-gradient(135deg, #04080f, #0d1f35);
}
body.dark-mode table { background: var(--clr-surface); }

/* ===== SCROLL REVEAL ANIMATION ===== */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== RESPONSIVE BREAKPOINTS ===== */

/* Tablet: 768px – 1024px */
@media (max-width: 1024px) {
    .favorites-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile: up to 768px */
@media (max-width: 768px) {
    /* Header */
    header {
        top: 10px;
        margin: 10px 12px;
        border-radius: 18px;
        height: auto;
        padding: 14px 18px;
    }
    .header-content { gap: 10px; }
    #mainTitle { font-size: 1.15rem; }

    .hamburger { display: flex; }

    /* Mobile nav drawer */
    nav {
        position: absolute;
        top: calc(100% + 10px);
        left: 0;
        right: 0;
        background: var(--clr-header-bg);
        border-radius: 0 0 18px 18px;
        padding: 0 18px;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.3s ease;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        box-shadow: 0 12px 30px rgba(0,0,0,0.3);
    }
    nav.open {
        max-height: 300px;
        padding: 10px 18px 16px;
    }

    .menu {
        flex-direction: column;
        gap: 4px;
        width: 100%;
    }
    .menu li a {
        padding: 11px 16px;
        border-radius: 10px;
        font-size: 1rem;
    }
    header #darkModeBtn {
        width: 100%;
        border-radius: 10px;
        margin-top: 6px;
        padding: 11px 16px;
    }

    /* Sections */
    .favorites-grid { grid-template-columns: 1fr; }
    .media-grid { grid-template-columns: 1fr; }

    .feature-buttons { flex-direction: column; align-items: center; }
    button { width: 100%; max-width: 320px; justify-content: center; }
    header button { max-width: none; }

    .hero-card h2 { font-size: clamp(1.4rem, 6vw, 2rem); }
}

/* Small mobile: up to 480px */
@media (max-width: 480px) {
    .section-title h2 { font-size: 1.5rem; }
    .hero-card { padding: 28px 18px; }
    .card { padding: 18px; }
    footer { border-radius: 14px; }
    header { border-radius: 14px; }
}

/* Print */
@media print {
    header, footer, #interactive-features { display: none; }
    body { background: white; color: black; }
    .card { box-shadow: none; border: 1px solid #ccc; }
}