/* =========================================================
   RESPONSIVE.CSS
   Shared responsive + mobile navigation styles for the
   DPSI MUN site. Load this AFTER every other stylesheet
   on the page so its rules can win the cascade.
   ========================================================= */

/* --- Hamburger button (injected by nav.js, hidden on desktop) --- */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 34px;
    height: 34px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1002;
    padding: 0;
    flex-shrink: 0;
}

.nav-toggle span {
    display: block;
    width: 26px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- Dropdown caret (mobile submenu toggle, injected by nav.js) --- */
.dropdown-caret {
    display: none;
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    padding: 6px 8px;
    margin-left: 6px;
    font-size: 0.8rem;
    line-height: 1;
}

.dropdown-caret i { transition: transform 0.3s ease; display: block; }

li.submenu-open .dropdown-caret i { transform: rotate(180deg); }

body.nav-lock { overflow: hidden; }

/* Let images and video never overflow their container */
img, video { max-width: 100%; }

/* =========================================================
   TABLET / MOBILE  —  900px and below
   ========================================================= */
@media (max-width: 900px) {

    nav {
        padding: 1.1rem 5%;
        flex-wrap: nowrap;
    }

    .arrow {
        display: none;
    }

    .nav-toggle { display: flex; }

    nav ul {
        position: fixed;
        top: 0;
        right: 0;
        height: 100vh;
        height: 100dvh;
        width: min(80vw, 320px);
        margin: 0;
        background: rgba(15, 15, 15, 0.97);
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        padding: 6rem 1.75rem 2rem;
        transform: translateX(100%);
        transition: transform 0.35s ease;
        overflow-y: auto;
        box-shadow: -8px 0 24px rgba(0, 0, 0, 0.4);
    }

    nav ul.nav-open { transform: translateX(0); }

    nav ul li {
        width: 100%;
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: space-between;
        border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        padding: 14px 0;
    }

    nav ul li a {
        font-size: 0.95rem !important;
        text-transform: lowercase;
    }

    .dropdown-caret { display: inline-flex; }

    .aboutcont, .committeecont {
        display: none;
        position: static;
        order: 3;
        width: 100%;
        min-width: 0;
        background: transparent;
        box-shadow: none;
        padding: 10px 0 0 12px;
        gap: 12px;
    }

    li.submenu-open .aboutcont,
    li.submenu-open .committeecont {
        display: flex;
    }

    .aboutcont a, .committeecont a {
        font-size: 0.85rem !important;
        color: rgba(255, 255, 255, 0.85) !important;
    }

    /* --- Type scaling --- */
    :root { --size-header: 2.4rem; }

    .Hero h1, .content h1, .header h1, .header-title h1, .secretariat-header h1 {
        white-space: normal !important;
        line-height: 1.25;
        letter-spacing: 1.5px !important;
    }

    .theme { font-size: 1.15rem !important; margin-top: 6px; }

    .Hero p { font-size: 0.95rem; }

    .btn {
        padding: 16px 26px;
        font-size: 0.8rem;
        margin-top: 20px;
    }

    /* --- Hero sections --- */
    .Hero, header.Hero-mini {
        height: auto;
        min-height: 60vh;
        padding: 120px 24px 50px;
    }

    /* --- Generic content sections (home page cards) --- */
    section {
        height: auto;
        min-height: 60vh;
        padding: 60px 24px;
    }

    /* --- Committees grid --- */
    .grid {
        grid-template-columns: 1fr;
        justify-items: center;
        gap: 20px;
        margin-bottom: 40px;
    }
    .card { width: 100%; max-width: 360px; }
    .section { margin: 40px auto; }
    .section h2 { margin: 40px 0 12px; font-size: 1.5rem; }

    /* --- Chair layout --- */
    .chair1, .chair2 {
        flex-direction: column;
        text-align: center;
        gap: 18px;
    }

    /* --- Contact page --- */
    .contact-container { margin: -40px 5% 60px; padding: 40px 24px; }
    .contact-info h2 { font-size: 1.8rem; }
    .contact-info p { font-size: 1rem; }

    /* --- Preparation page --- */
    .Prepcont { padding: 50px 6%; }
    .res1, .res2 { padding: 1.25rem 1.5rem; }
}

/* =========================================================
   SMALL PHONES  —  480px and below
   ========================================================= */
@media (max-width: 480px) {
    :root { --size-header: 1.85rem; }

    nav { padding: 1rem 5%; }
    nav img { height: 38px !important; }

    .Hero, header.Hero-mini {
        min-height: 52vh;
        padding: 100px 18px 40px;
    }

    .theme { font-size: 0.95rem !important; }

    section h1, .section h2 { font-size: 1.6rem; }

    .card, .card img { height: 190px; }

    .chair1 img, .chair2 img { width: 130px; height: 150px; }
    .chair-text h4 { font-size: 1.2rem; }

    .contact-details { margin-top: 25px; padding-top: 25px; }
    .detail-item i { font-size: 2rem; }
}