/* ============================================
   COMPONENTS — Nav, Cards, Modals, Buttons, etc.
   ============================================ */

/* ---- NAVIGATION ---- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    background: var(--bg-nav);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-default);
    transition:
        background-color var(--transition-smooth),
        border-color var(--transition-smooth),
        box-shadow var(--transition-base);
}

.nav.scrolled {
    box-shadow: var(--shadow-md);
}

.nav__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav__logo {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--purple-deep);
    transition: color var(--transition-smooth);
}

[data-theme="dark"] .nav__logo {
    color: var(--purple-glow);
}

.nav__links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav__link {
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--purple-vivid);
    border-radius: var(--radius-full);
    transition: width var(--transition-smooth);
}

.nav__link:hover,
.nav__link.active {
    color: var(--purple-vivid);
}

.nav__link:hover::after,
.nav__link.active::after {
    width: 100%;
}

/* ---- THEME TOGGLE ---- */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--bg-elevated);
    border: 1px solid var(--border-default);
    color: var(--text-secondary);
    font-size: 1.1rem;
    cursor: pointer;
    transition:
        background-color var(--transition-fast),
        border-color var(--transition-fast),
        color var(--transition-fast),
        transform var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--purple-wash);
    border-color: var(--border-hover);
    color: var(--purple-vivid);
    transform: rotate(15deg);
}

[data-theme="dark"] .theme-toggle:hover {
    background: var(--bg-card-hover);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

/* Sun visible in light mode, moon in dark mode */
.theme-toggle .icon-moon {
    display: none;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    display: none;
}

[data-theme="dark"] .theme-toggle .icon-moon {
    display: inline;
}

/* ---- HERO ---- */
.hero__content {
    text-align: center;
}

.hero__title {
    margin-bottom: var(--space-md);
}

.hero__title span {
    display: inline-block;
    background: linear-gradient(135deg, var(--purple-deep), var(--purple-vivid), var(--purple-glow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

.hero__cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ---- BUTTONS ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.95rem;
    transition:
        background-color var(--transition-fast),
        color var(--transition-fast),
        transform var(--transition-fast),
        box-shadow var(--transition-fast);
}

.btn:hover {
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0);
}

.btn--primary {
    background: linear-gradient(135deg, var(--purple-deep), var(--purple-vivid));
    color: var(--text-on-purple);
    box-shadow: 0 4px 16px rgba(74, 45, 138, 0.3);
}

.btn--primary:hover {
    box-shadow: 0 8px 24px rgba(74, 45, 138, 0.4);
    color: var(--text-on-purple);
}

.btn--secondary {
    background: var(--bg-elevated);
    color: var(--purple-vivid);
    border: 1px solid var(--border-hover);
}

.btn--secondary:hover {
    background: var(--purple-wash);
    border-color: var(--purple-vivid);
    color: var(--purple-vivid);
}

[data-theme="dark"] .btn--secondary:hover {
    background: var(--bg-card-hover);
}

/* ---- PROJECT CARDS ---- */
.project-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition:
        transform var(--transition-smooth),
        box-shadow var(--transition-smooth),
        border-color var(--transition-smooth),
        background-color var(--transition-smooth);
    cursor: pointer;
}

.project-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: var(--border-hover);
}

.project-card__thumbnail {
    width: 100%;
    height: 200px;
    background: var(--purple-wash);
    overflow: hidden;
    position: relative;
}

[data-theme="dark"] .project-card__thumbnail {
    background: var(--bg-elevated);
}

.project-card__thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-smooth);
}

.project-card:hover .project-card__thumbnail img {
    transform: scale(1.05);
}

/* Placeholder when no thumbnail */
.project-card__thumbnail--placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--purple-glow);
    background: linear-gradient(135deg, var(--purple-wash), var(--purple-mist));
}

[data-theme="dark"] .project-card__thumbnail--placeholder {
    background: linear-gradient(135deg, var(--bg-elevated), #211D2E);
}

.project-card__body {
    padding: var(--space-lg);
}

.project-card__title {
    font-size: 1.15rem;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.project-card__description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.6;
    /* Clamp to 3 lines */
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.project-card__tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

/* ---- TECH PILLS ---- */
.tech-pill {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-full);
    background: var(--purple-wash);
    color: var(--purple-deep);
    border: 1px solid transparent;
    transition:
        background-color var(--transition-fast),
        color var(--transition-fast);
}

[data-theme="dark"] .tech-pill {
    background: rgba(167, 139, 250, 0.1);
    color: var(--purple-glow);
}

/* ---- CARD ACTION LINKS ---- */
.project-card__actions {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-default);
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--purple-vivid);
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.card-link:hover {
    color: var(--purple-glow);
    transform: translateY(-1px);
}

.card-link i {
    font-size: 0.78rem;
}

/* ---- MODAL ---- */
.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: var(--bg-modal-overlay);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    opacity: 0;
    visibility: hidden;
    transition:
        opacity var(--transition-smooth),
        visibility var(--transition-smooth);
}

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

.modal {
    background: var(--bg-elevated);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 900px;
    max-height: 85vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    transform: translateY(30px) scale(0.97);
    transition:
        transform var(--transition-spring),
        background-color var(--transition-smooth),
        border-color var(--transition-smooth);
}

.modal-overlay.active .modal {
    transform: translateY(0) scale(1);
}

.modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) var(--space-xl);
    border-bottom: 1px solid var(--border-default);
    flex-shrink: 0;
}

.modal__title {
    font-size: 1.25rem;
    font-weight: 700;
}

.modal__close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    color: var(--text-tertiary);
    font-size: 1.25rem;
    transition:
        background-color var(--transition-fast),
        color var(--transition-fast);
}

.modal__close:hover {
    background: var(--purple-wash);
    color: var(--purple-vivid);
}

[data-theme="dark"] .modal__close:hover {
    background: var(--bg-card-hover);
}

.modal__body {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-xl);
}

/* For iframe-based modals */
.modal__body--iframe {
    padding: 0;
}

.modal__body--iframe iframe {
    width: 100%;
    height: 100%;
    min-height: 60vh;
    border: none;
}

/* Modal footer for actions like download resume */
.modal__footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-xl);
    border-top: 1px solid var(--border-default);
    flex-shrink: 0;
}

/* ---- SECTION HEADERS ---- */
.section__header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section__title {
    margin-bottom: var(--space-sm);
}

.section__subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* ---- MOBILE NAV HAMBURGER ---- */
.nav__hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 28px;
    cursor: pointer;
    padding: var(--space-xs);
}

.nav__hamburger span {
    display: block;
    height: 2px;
    background: var(--text-primary);
    border-radius: var(--radius-full);
    transition:
        transform var(--transition-base),
        opacity var(--transition-base);
}

.nav__hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav__hamburger.active span:nth-child(2) {
    opacity: 0;
}

.nav__hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 768px) {
    .nav__hamburger {
        display: flex;
    }

    .nav__links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--bg-nav);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        flex-direction: column;
        padding: var(--space-xl);
        gap: var(--space-lg);
        border-bottom: 1px solid var(--border-default);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition:
            transform var(--transition-smooth),
            opacity var(--transition-smooth),
            visibility var(--transition-smooth);
    }

    .nav__links.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav__link {
        font-size: 1.1rem;
    }

    .hero__subtitle {
        font-size: 0.95rem;
        padding: 0 var(--space-sm);
    }

    .hero__cta {
        gap: var(--space-sm);
    }

    .btn {
        padding: 0.7rem 1.25rem;
        font-size: 0.9rem;
    }

    .project-card__thumbnail {
        height: 180px;
    }

    .modal {
        max-height: 95vh;
        border-radius: var(--radius-md);
        margin: var(--space-sm);
    }

    .modal__header {
        padding: var(--space-md) var(--space-lg);
    }

    .modal__title {
        font-size: 1.1rem;
    }

    .modal__body {
        padding: var(--space-lg);
    }

    .modal__footer {
        padding: var(--space-md) var(--space-lg);
        flex-wrap: wrap;
        justify-content: center;
    }

    .modal__footer .btn {
        flex: 1;
        justify-content: center;
        min-width: 140px;
    }

    .section__header {
        margin-bottom: var(--space-xl);
    }

    .section__subtitle {
        font-size: 0.95rem;
    }
}

/* Small phones */
@media (max-width: 380px) {
    .hero__cta {
        flex-direction: column;
        align-items: center;
    }

    .hero__cta .btn {
        width: 100%;
        justify-content: center;
    }

    .nav__logo {
        font-size: 1.1rem;
    }

    .project-card__body {
        padding: var(--space-md);
    }

    .project-card__title {
        font-size: 1.05rem;
    }
}

/* ---- Light Mode Enhancements ---- */
:root .project-card {
    box-shadow: var(--shadow-sm);
}

:root .project-card:hover {
    box-shadow: var(--shadow-lg), 0 0 0 1px var(--border-hover);
}

/* Subtle radial glow behind hero in light mode */
.section--hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: min(600px, 100vw);
    height: min(600px, 100vw);
    background: radial-gradient(circle, rgba(167, 139, 250, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: -1;
}

[data-theme="dark"] .section--hero::before {
    background: radial-gradient(circle, rgba(167, 139, 250, 0.06) 0%, transparent 70%);
}