/* ============================================
   Tim Blok — Felix Digital | Portfolio
   Modern CSS with Custom Properties & Grid
   ============================================ */

/* --- Custom Properties --- */
:root {
    --color-primary: #ffcc1d;
    --color-primary-dark: #e6b800;
    --color-dark: #111;
    --color-text: #333;
    --color-text-light: #666;
    --color-white: #fff;
    --color-bg: #f5f5f5;
    --color-overlay: rgba(0, 0, 0, 0.4);

    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    --sidebar-width-collapsed: 80px;
    --sidebar-width-expanded: 320px;

    --transition-fast: 0.2s ease;
    --transition-normal: 0.35s ease;
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --shadow-hover: 0 12px 40px rgba(0,0,0,0.18);

    --radius: 8px;
    --radius-lg: 12px;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-main);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: var(--color-primary-dark);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-dark);
}

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

/* --- Splash Screen --- */
.splash {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: var(--color-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

.splash.is-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.splash__content {
    text-align: center;
    animation: fadeInUp 0.8s ease both;
}

.splash__logo {
    width: 100px;
    margin: 0 auto 24px;
}

.splash__title {
    color: var(--color-white);
    font-size: 1.25rem;
    font-weight: 300;
    letter-spacing: 0.02em;
}

.splash__title strong {
    font-weight: 600;
}

.splash__subtitle {
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-top: 12px;
    font-weight: 300;
}

.splash__link {
    color: var(--color-primary) !important;
    font-weight: 500;
}

.splash__link:hover {
    color: var(--color-white) !important;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Overlay --- */
.overlay {
    position: fixed;
    inset: 0;
    z-index: 800;
    background: var(--color-overlay);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
    pointer-events: none;
}

.overlay.is-visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

/* --- Layout --- */
.layout {
    display: flex;
    min-height: 100vh;
}

/* --- Sidebar --- */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: var(--sidebar-width-collapsed);
    background: var(--color-primary);
    z-index: 900;
    overflow: hidden;
    transition: width var(--transition-slow);
    display: flex;
    flex-direction: column;
}

.sidebar:hover,
.sidebar.is-open {
    width: var(--sidebar-width-expanded);
}

.sidebar__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px;
    flex-shrink: 0;
}

.sidebar__logo {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
}

.sidebar__toggle-icon {
    opacity: 0;
    transition: opacity var(--transition-fast);
    color: var(--color-dark);
}

.sidebar:hover .sidebar__toggle-icon,
.sidebar.is-open .sidebar__toggle-icon {
    opacity: 0.4;
    transform: rotate(180deg);
}

.sidebar__body {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 0 24px 24px;
    opacity: 0;
    transform: translateX(-10px);
    transition: opacity var(--transition-normal) 0.1s, transform var(--transition-normal) 0.1s;
    overflow-y: auto;
}

.sidebar:hover .sidebar__body,
.sidebar.is-open .sidebar__body {
    opacity: 1;
    transform: translateX(0);
}

.sidebar__name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 2px;
}

.sidebar__role {
    font-size: 0.85rem;
    color: var(--color-text);
    margin-bottom: 16px;
}

.sidebar__fd-link {
    color: var(--color-dark) !important;
    font-weight: 600;
    border-bottom: 2px solid var(--color-dark);
    padding-bottom: 1px;
}

.sidebar__fd-link:hover {
    color: var(--color-text) !important;
    border-color: var(--color-text);
}

.sidebar__divider {
    width: 30px;
    height: 2px;
    background: var(--color-dark);
    opacity: 0.2;
    margin: 14px 0;
}

.sidebar__text {
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--color-text);
}

.sidebar__label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
    color: var(--color-text-light);
    margin-bottom: 8px;
}

.sidebar__experience {
    list-style: none;
    font-size: 0.8rem;
    line-height: 1.8;
    color: var(--color-text);
}

.sidebar__experience strong {
    font-weight: 600;
}

.sidebar__email a {
    color: var(--color-dark) !important;
    font-weight: 500;
    font-size: 0.85rem;
}

.sidebar__email a:hover {
    opacity: 0.7;
}

/* Social links */
.sidebar__social {
    display: flex;
    gap: 12px;
    padding-top: 20px;
    flex-shrink: 0;
}

.sidebar__social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.7;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.sidebar__social-link:hover {
    opacity: 1;
    transform: translateY(-2px);
}

.sidebar__social-link img,
.sidebar__social-link svg {
    width: 32px;
    height: 32px;
}

/* --- Portfolio / Main --- */
.portfolio {
    flex: 1;
    margin-left: var(--sidebar-width-collapsed);
    padding: 60px 40px 40px;
    transition: margin-left var(--transition-slow);
}

.portfolio__header {
    max-width: 600px;
    margin-bottom: 40px;
}

.portfolio__title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.portfolio__intro {
    font-size: 0.95rem;
    color: var(--color-text-light);
    line-height: 1.7;
}

.portfolio__intro a {
    color: var(--color-dark);
    font-weight: 600;
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: 1px;
}

.portfolio__intro a:hover {
    color: var(--color-primary-dark);
}

/* --- Project Grid --- */
.portfolio__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 28px;
    max-width: 1400px;
}

.project {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    background: var(--color-white);
}

.project:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.project__link {
    display: block;
    position: relative;
    overflow: hidden;
}

.project__image {
    width: 100%;
    display: block;
    transition: transform var(--transition-slow);
}

.project:hover .project__image {
    transform: scale(1.04);
}

.project__overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.93);
    opacity: 0;
    transition: opacity var(--transition-normal);
    padding: 24px;
    text-align: center;
}

.project:hover .project__overlay {
    opacity: 1;
}

.project__name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-dark);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.project__type {
    font-size: 0.8rem;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 500;
}

/* --- Footer --- */
.site-footer {
    margin-top: 60px;
    padding: 30px 0;
    border-top: 1px solid rgba(0,0,0,0.08);
}

.site-footer__text {
    font-size: 0.8rem;
    color: var(--color-text-light);
}

.site-footer__link {
    color: var(--color-dark) !important;
    font-weight: 600;
}

.site-footer__link:hover {
    color: var(--color-primary-dark) !important;
}

/* ============================================
   Responsive
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
    .portfolio__grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 20px;
    }

    .portfolio {
        padding: 40px 24px 24px;
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --sidebar-width-collapsed: 0px;
        --sidebar-width-expanded: 280px;
    }

    .sidebar {
        width: 0;
        transform: translateX(-100%);
    }

    .sidebar.is-open {
        width: var(--sidebar-width-expanded);
        transform: translateX(0);
    }

    .sidebar:hover {
        width: 0;
        transform: translateX(-100%);
    }

    .sidebar.is-open:hover {
        width: var(--sidebar-width-expanded);
        transform: translateX(0);
    }

    .portfolio {
        margin-left: 0;
        padding: 24px 16px 16px;
    }

    .portfolio__header {
        margin-bottom: 24px;
    }

    .portfolio__title {
        font-size: 1.5rem;
    }

    .portfolio__grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    /* Mobile hamburger */
    .mobile-menu-btn {
        display: flex;
    }
}

/* Mobile menu button (hidden on desktop) */
.mobile-menu-btn {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 950;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-primary);
    border: none;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-fast);
}

.mobile-menu-btn:hover {
    transform: scale(1.08);
}

.mobile-menu-btn svg {
    width: 22px;
    height: 22px;
    color: var(--color-dark);
}

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

/* --- Utility animations --- */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.project {
    animation: fadeIn 0.5s ease both;
}

.project:nth-child(1) { animation-delay: 0.05s; }
.project:nth-child(2) { animation-delay: 0.1s; }
.project:nth-child(3) { animation-delay: 0.15s; }
.project:nth-child(4) { animation-delay: 0.2s; }
.project:nth-child(5) { animation-delay: 0.25s; }
.project:nth-child(6) { animation-delay: 0.3s; }
.project:nth-child(7) { animation-delay: 0.35s; }
.project:nth-child(8) { animation-delay: 0.4s; }
.project:nth-child(9) { animation-delay: 0.45s; }
.project:nth-child(10) { animation-delay: 0.5s; }