/* ═══════════════════════════════════════════════════════════════════
   BASE CSS — shared components for all apps
   Depends on tokens.css being loaded first.
   Class prefix: .ia-  (avoids Bootstrap conflicts)
   ═══════════════════════════════════════════════════════════════════ */

/* ── Box-sizing reset ── */
*, *::before, *::after {
    box-sizing: border-box;
}

/* ── Typography ── */
body {
    font-family: var(--font-body);
    background: var(--bg-deep);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

/* ── Scrollbar theming ── */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-deep);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ═══════════════════════════════════════════════════════════════════
   NAVBAR — .ia-nav
   Fixed top, transparent bg, scroll shadow on scroll.
   Flex layout: brand left, links center, user/login right.
   ═══════════════════════════════════════════════════════════════════ */
.ia-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    transition: background .4s ease, box-shadow .4s ease;
}

[data-theme="light"] .ia-nav {
    border-bottom-color: rgba(0,0,0,0.06);
}

.ia-nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 22px 24px;
    transition: padding .3s ease;
}

.ia-nav-left {
    display: flex;
    align-items: center;
    gap: 24px;
}

.ia-nav-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.ia-nav.scrolled {
    box-shadow: 0 1px 40px rgba(0,0,0,0.3);
}

.ia-nav.scrolled .ia-nav-inner {
    padding-top: 14px;
    padding-bottom: 14px;
}

[data-theme="light"] .ia-nav.scrolled {
    box-shadow: 0 1px 30px rgba(27, 42, 74, 0.08);
}

/* ── Brand ── */
.ia-nav-brand {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05rem;
    font-family: var(--font-heading);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: color .2s ease;
    letter-spacing: 0.01em;
}

.ia-nav-brand-icon {
    font-size: 1.1rem;
    color: var(--accent);
    flex-shrink: 0;
    transition: color .2s ease;
}

.ia-nav-brand:hover .ia-nav-brand-icon {
    color: var(--accent-hover);
}

.ia-nav-brand:hover {
    color: var(--accent);
}

/* ── Nav links ── */
.ia-nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.ia-nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: .875rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 100px;
    transition: color .2s ease, background .2s ease;
}

.ia-nav-link:hover {
    color: var(--text-primary);
    background: rgba(255,255,255,0.06);
}

[data-theme="light"] .ia-nav-link:hover {
    background: rgba(27, 42, 74, 0.05);
}

.ia-nav-link.active {
    color: var(--text-primary);
    background: rgba(255,255,255,0.08);
}

[data-theme="light"] .ia-nav-link.active {
    background: rgba(27, 42, 74, 0.07);
}

/* ── User dropdown ── */
.ia-nav-user {
    position: relative;
    display: inline-block;
}

.ia-nav-user-btn {
    background: rgba(255,255,255,0.06);
    border: none;
    border-radius: 100px;
    color: var(--text-secondary);
    padding: 8px 14px;
    font-size: .85rem;
    cursor: pointer;
    font-family: inherit;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all .2s ease;
}

[data-theme="light"] .ia-nav-user-btn {
    background: rgba(27, 42, 74, 0.06);
}

.ia-nav-user-btn:hover {
    color: var(--text-primary);
    background: rgba(255,255,255,0.1);
}

[data-theme="light"] .ia-nav-user-btn:hover {
    background: rgba(27, 42, 74, 0.1);
}

.ia-nav-user-menu {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    min-width: 190px;
    padding: 6px 0;
    box-shadow: 0 16px 48px rgba(0,0,0,0.4);
    animation: ia-menuIn .15s ease;
}

[data-theme="light"] .ia-nav-user-menu {
    background: #FDFBF7;
    border-color: rgba(27, 42, 74, 0.1);
    box-shadow: 0 16px 48px rgba(27, 42, 74, 0.12);
}

@keyframes ia-menuIn {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0); }
}

.ia-nav-user.open .ia-nav-user-menu {
    display: block;
}

.ia-nav-user-menu a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: .85rem;
    transition: all .15s;
}

.ia-nav-user-menu a:hover {
    color: var(--text-primary);
    background: rgba(255,255,255,0.04);
}

[data-theme="light"] .ia-nav-user-menu a:hover {
    background: rgba(27, 42, 74, 0.04);
}

.ia-nav-user-menu hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 4px 0;
}

/* ── Login link (unauthenticated) ── */
.ia-nav-login {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: .85rem;
    font-weight: 500;
    padding: 8px 18px;
    border-radius: 100px;
    border: 1px solid rgba(255,255,255,0.12);
    transition: all .2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

[data-theme="light"] .ia-nav-login {
    border-color: rgba(27, 42, 74, 0.18);
}

.ia-nav-login:hover {
    color: var(--text-primary);
    border-color: rgba(255,255,255,0.22);
    background: rgba(255,255,255,0.04);
}

[data-theme="light"] .ia-nav-login:hover {
    border-color: rgba(27, 42, 74, 0.3);
    background: rgba(27, 42, 74, 0.04);
}

/* ═══════════════════════════════════════════════════════════════════
   HAMBURGER + OVERLAY (mobile menu)
   ═══════════════════════════════════════════════════════════════════ */
.ia-nav-hamburger,
.ia-nav-close,
.ia-nav-overlay {
    display: none;
}

.ia-nav-hamburger {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--text-primary);
    font-size: 1.3rem;
    line-height: 1;
}

@media (max-width: 768px) {
    .ia-nav-hamburger {
        display: flex;
        align-items: center;
    }

    .ia-nav-links {
        display: none;
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        width: 280px;
        max-width: 80vw;
        background: var(--bg-deep);
        flex-direction: column;
        align-items: stretch;
        padding: 72px 20px 24px;
        gap: 4px;
        box-shadow: -8px 0 40px rgba(0,0,0,0.3);
        z-index: 200;
        transform: translateX(100%);
        transition: transform .3s ease;
    }

    .ia-nav-links.open {
        display: flex;
        transform: translateX(0);
    }

    .ia-nav-link,
    .ia-nav-login {
        padding: 12px 16px;
        border-radius: 10px;
        font-size: .95rem;
        width: 100%;
        text-align: left;
    }

    .ia-nav-login {
        justify-content: center;
        margin-top: 8px;
    }

    .ia-nav-user {
        width: 100%;
    }

    .ia-nav-user-btn {
        width: 100%;
        justify-content: center;
        padding: 12px 16px;
        border-radius: 10px;
    }

    .ia-nav-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.3);
        z-index: 199;
    }

    .ia-nav-overlay.open {
        display: block;
    }

    .ia-nav-close {
        position: absolute;
        top: 18px;
        right: 16px;
        background: none;
        border: none;
        cursor: pointer;
        color: var(--text-secondary);
        font-size: 1.3rem;
        padding: 4px;
    }

    .ia-nav-close:hover {
        color: var(--text-primary);
    }
}

/* ═══════════════════════════════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════════════════════════════ */
.ia-btn-accent {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 14px 32px;
    border-radius: 100px;
    font-family: var(--font-body);
    font-size: .95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .2s ease;
    text-decoration: none;
}

[data-theme="light"] .ia-btn-accent {
    color: #fff;
}

[data-app="cursos"] .ia-btn-accent,
[data-app="meurpps"] .ia-btn-accent {
    color: #0F1923;
}

.ia-btn-accent:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.ia-btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
    padding: 12px 28px;
    border-radius: 100px;
    font-family: var(--font-body);
    font-size: .9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all .2s ease;
    text-decoration: none;
}

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

[data-app="cursos"] .ia-btn-outline:hover,
[data-app="meurpps"] .ia-btn-outline:hover {
    color: #0F1923;
}

/* ═══════════════════════════════════════════════════════════════════
   MESSAGES (Django messages framework)
   ═══════════════════════════════════════════════════════════════════ */
.ia-messages {
    position: fixed;
    top: 72px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1050;
    width: 100%;
    max-width: var(--maxw);
    padding: 0 24px;
    pointer-events: none;
}

.ia-messages .ia-msg {
    pointer-events: auto;
    animation: ia-msg-in 0.3s ease;
}

@keyframes ia-msg-in {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
}

.ia-msg {
    padding: 14px 20px;
    border-radius: 10px;
    font-size: .9rem;
    margin-bottom: 12px;
    position: relative;
}

.ia-msg-success {
    background: rgba(34, 197, 94, 0.12);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: var(--color-green);
}

.ia-msg-error {
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--color-red);
}

.ia-msg-warning {
    background: rgba(245, 158, 11, 0.12);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: var(--color-amber);
}

.ia-msg-info {
    background: rgba(6, 182, 212, 0.12);
    border: 1px solid rgba(6, 182, 212, 0.3);
    color: var(--color-cyan);
}

/* ═══════════════════════════════════════════════════════════════════
   RESPONSIVE — general adjustments at 768px
   ═══════════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
    .ia-nav-inner {
        padding-left: 16px;
        padding-right: 16px;
    }
}