/* ==========================================================================
   namu.land — Corporate Ethereal-Blue Sidebar
   ========================================================================== */

/* --- CSS Custom Properties --- */
:root {
    --color-deep-blue-grey: #1A2838;
    --color-medium-blue-grey: #3A4858;
    --color-steel: #5A7088;
    --color-ethereal-bg: #F0F4F8;
    --color-sidebar-light: #E8F0F8;
    --color-border-cool: #C8D8E8;
    --color-duotone-blue: #6090C0;
    --color-vintage-grid: #D8E0E8;
}

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

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

body {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    color: var(--color-medium-blue-grey);
    background-color: var(--color-ethereal-bg);
    line-height: 1.8;
    font-size: clamp(0.95rem, 1.2vw, 1.1rem);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* --- Sidebar --- */
#sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 180px;
    height: 100vh;
    background-color: var(--color-sidebar-light);
    border-right: 1px solid var(--color-border-cool);
    display: flex;
    flex-direction: column;
    padding: 2rem 0;
    z-index: 100;
    transform: translateX(-180px);
    transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

#sidebar.visible {
    transform: translateX(0);
}

#sidebar-logo {
    padding: 0 1.25rem;
    margin-bottom: 3rem;
}

.logo-text {
    font-family: 'Exo 2', sans-serif;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-deep-blue-grey);
    letter-spacing: 0.08em;
}

.logo-dot {
    font-family: 'Exo 2', sans-serif;
    font-weight: 400;
    font-size: 1.1rem;
    color: var(--color-steel);
    letter-spacing: 0.08em;
}

#sidebar-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.nav-link {
    display: block;
    padding: 0.6rem 1.25rem;
    font-family: 'Space Mono', monospace;
    font-weight: 400;
    font-size: 0.75rem;
    color: var(--color-steel);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    transition: color 0.3s ease, background-color 0.3s ease;
    position: relative;
}

.nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 2px;
    height: 100%;
    background-color: var(--color-duotone-blue);
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-deep-blue-grey);
    background-color: rgba(96, 144, 192, 0.08);
}

.nav-link.active::before {
    transform: scaleY(1);
}

#sidebar-footer {
    padding: 0 1.25rem;
}

.sidebar-meta {
    font-family: 'Space Mono', monospace;
    font-size: 0.7rem;
    color: var(--color-steel);
    opacity: 0.6;
}

/* --- Main Content --- */
#main-content {
    margin-left: 180px;
    min-height: 100vh;
}

/* --- Sections --- */
.section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 6rem 4rem;
    overflow: hidden;
}

/* --- Vintage Grid Overlay --- */
.vintage-grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(to right, var(--color-vintage-grid) 1px, transparent 1px),
        linear-gradient(to bottom, var(--color-vintage-grid) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.2;
    pointer-events: none;
    z-index: 0;
}

/* --- Hero Section --- */
#hero {
    justify-content: flex-start;
    align-items: center;
}

.hero-inner {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

#hero-title {
    font-family: 'Exo 2', sans-serif;
    font-weight: 700;
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--color-deep-blue-grey);
    letter-spacing: 0.12em;
    margin-bottom: 1.5rem;
    position: relative;
}

.hero-subtitle {
    font-family: 'Inter', sans-serif;
    font-weight: 300;
    font-size: clamp(0.95rem, 1.2vw, 1.1rem);
    color: var(--color-medium-blue-grey);
    max-width: 480px;
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.8s ease 0.4s, transform 0.8s ease 0.4s;
}

.hero-subtitle.visible {
    opacity: 1;
    transform: translateY(0);
}

.hero-line {
    width: 60px;
    height: 1px;
    background-color: var(--color-border-cool);
    opacity: 0;
    transform: scaleX(0);
    transform-origin: left;
    transition: opacity 0.6s ease 0.8s, transform 0.6s ease 0.8s;
}

.hero-line.visible {
    opacity: 1;
    transform: scaleX(1);
}

/* --- Section Headings --- */
.section-heading {
    font-family: 'Exo 2', sans-serif;
    font-weight: 700;
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--color-deep-blue-grey);
    letter-spacing: 0.06em;
    margin-bottom: 3rem;
    position: relative;
}

/* --- Section Content --- */
.section-content {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 960px;
}

/* --- About Section --- */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.content-block p {
    margin-bottom: 1.2rem;
    color: var(--color-medium-blue-grey);
}

/* --- Duotone Photography --- */
.duotone-image {
    position: relative;
    width: 100%;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    border-radius: 2px;
}

.duotone-base {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-border-cool) 0%, var(--color-sidebar-light) 40%, var(--color-vintage-grid) 70%, var(--color-border-cool) 100%);
    filter: grayscale(1);
}

.duotone-overlay {
    position: absolute;
    inset: 0;
    background-color: var(--color-duotone-blue);
    mix-blend-mode: color;
    opacity: 0.7;
}

/* Unique patterns per duotone panel */
#duotone-1 .duotone-base {
    background: linear-gradient(135deg, #B8C8D8 0%, var(--color-vintage-grid) 30%, var(--color-border-cool) 60%, var(--color-sidebar-light) 100%);
    background-size: 200% 200%;
}

#duotone-2 .duotone-base {
    background:
        radial-gradient(circle at 30% 40%, var(--color-border-cool) 0%, transparent 50%),
        radial-gradient(circle at 70% 60%, var(--color-vintage-grid) 0%, transparent 50%),
        linear-gradient(180deg, var(--color-sidebar-light), var(--color-border-cool));
}

#duotone-3 .duotone-base {
    background:
        repeating-linear-gradient(
            45deg,
            var(--color-vintage-grid),
            var(--color-vintage-grid) 8px,
            var(--color-sidebar-light) 8px,
            var(--color-sidebar-light) 16px
        );
    filter: grayscale(1) blur(1px);
}

#duotone-4 .duotone-base {
    background:
        linear-gradient(90deg, var(--color-border-cool) 50%, transparent 50%),
        linear-gradient(180deg, var(--color-sidebar-light) 50%, transparent 50%),
        linear-gradient(0deg, var(--color-vintage-grid), var(--color-sidebar-light));
    background-size: 20px 20px, 20px 20px, 100% 100%;
    filter: grayscale(1);
}

/* --- Services Section --- */
.services-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
}

.service-card {
    padding: 2rem;
    border: 1px solid var(--color-border-cool);
    background-color: rgba(232, 240, 248, 0.4);
    transition: background-color 0.3s ease;
}

.service-card:hover {
    background-color: rgba(232, 240, 248, 0.8);
}

.service-number {
    font-family: 'Space Mono', monospace;
    font-size: 0.7rem;
    color: var(--color-duotone-blue);
    letter-spacing: 0.1em;
    display: block;
    margin-bottom: 1rem;
}

.service-title {
    font-family: 'Exo 2', sans-serif;
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--color-deep-blue-grey);
    margin-bottom: 0.75rem;
}

.service-desc {
    font-weight: 300;
    color: var(--color-medium-blue-grey);
    font-size: 0.92rem;
    line-height: 1.7;
}

/* --- Work Section --- */
.work-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.work-item {
    position: relative;
}

.work-image {
    aspect-ratio: 3 / 2;
    margin-bottom: 1rem;
}

.work-info {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}

.work-title {
    font-family: 'Exo 2', sans-serif;
    font-weight: 400;
    font-size: 0.95rem;
    color: var(--color-deep-blue-grey);
}

.work-tag {
    font-family: 'Space Mono', monospace;
    font-size: 0.65rem;
    color: var(--color-steel);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* --- Contact Section --- */
.contact-content {
    max-width: 500px;
}

.contact-text {
    font-weight: 300;
    color: var(--color-medium-blue-grey);
    margin-bottom: 2.5rem;
    font-size: 1.05rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.contact-line {
    display: flex;
    gap: 2rem;
    align-items: baseline;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border-cool);
}

.contact-label {
    font-family: 'Space Mono', monospace;
    font-size: 0.7rem;
    color: var(--color-steel);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    min-width: 80px;
}

.contact-value {
    font-weight: 300;
    color: var(--color-deep-blue-grey);
    font-size: 0.95rem;
}

/* --- Glitch Effect --- */
.glitch-active {
    animation: glitchFlicker 100ms steps(2) 1;
}

@keyframes glitchFlicker {
    0% {
        text-shadow:
            2px 0 var(--color-duotone-blue),
            -2px 0 var(--color-border-cool);
        transform: translate(0);
    }
    25% {
        text-shadow:
            -2px 0 var(--color-duotone-blue),
            2px 0 var(--color-border-cool);
        transform: translate(1px, -1px);
    }
    50% {
        text-shadow:
            2px 0 var(--color-border-cool),
            -2px 0 var(--color-duotone-blue);
        transform: translate(-1px, 1px);
    }
    75% {
        text-shadow:
            -2px 0 var(--color-border-cool),
            2px 0 var(--color-duotone-blue);
        transform: translate(1px, 0);
    }
    100% {
        text-shadow: none;
        transform: translate(0);
    }
}

/* --- Scroll reveal for sections --- */
.section-content,
.hero-inner {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.section-content.revealed,
.hero-inner.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 900px) {
    #sidebar {
        width: 140px;
    }

    #main-content {
        margin-left: 140px;
    }

    .section {
        padding: 4rem 2.5rem;
    }

    .content-grid {
        grid-template-columns: 1fr;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .work-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 600px) {
    #sidebar {
        width: 100%;
        height: auto;
        position: fixed;
        top: 0;
        left: 0;
        flex-direction: row;
        align-items: center;
        padding: 0.75rem 1rem;
        border-right: none;
        border-bottom: 1px solid var(--color-border-cool);
        transform: translateY(-100%);
    }

    #sidebar.visible {
        transform: translateY(0);
    }

    #sidebar-logo {
        margin-bottom: 0;
        padding: 0;
    }

    #sidebar-nav {
        flex-direction: row;
        gap: 0;
        overflow-x: auto;
    }

    .nav-link {
        padding: 0.5rem 0.75rem;
        font-size: 0.65rem;
        white-space: nowrap;
    }

    .nav-link::before {
        display: none;
    }

    #sidebar-footer {
        display: none;
    }

    #main-content {
        margin-left: 0;
        margin-top: 50px;
    }

    .section {
        padding: 3rem 1.5rem;
        min-height: auto;
    }

    .work-grid {
        grid-template-columns: 1fr;
    }
}