/* ── RESET & VARIABLES ────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
   /* DARK THEME — black & red */
   --bg:        #0d0d0d;
   --bg-deep:   #0a0a0a;
   --bg-card:   #1f1f23;
   --border:    #2a2a2a;
   --text:      #ffffff;
   --text-muted:#888888;
   --accent:    #ff0033;
   --accent2:   #ffffff;
   --font-head: 'BBH Bartle', sans-serif;
   --font-body: 'Courier New', Courier, monospace;
   --radius:    8px;
   --transition: 0.3s ease;
}

[data-theme="light"] {
   /* LIGHT THEME — blue & creamy */
   --bg:        #fff8ee;
   --bg-deep:   #f6e4c8;
   --bg-card:   #ffffff;
   --border:    #2f6690;
   --text:      #1b3b6f;
   --text-muted:#2f6690;
   --accent:    #1b3b6f;
   --accent2:   #2f6690;
}

/* ── BASE ─────────────────────────────────────────── */
body {
   font-family: var(--font-body);
   background-color: var(--bg);
   color: var(--text);
   line-height: 1.7;
   transition: background-color var(--transition), color var(--transition);
}

.container {
   max-width: 860px;
   margin: 0 auto;
   padding: 0 24px;
}

a {
   color: var(--accent);
   text-decoration: none;
   transition: color var(--transition);
}
a:hover { color: var(--accent2); }

/* ── THEME SWITCH ─────────────────────────────────── */
.theme-switch {
   display: flex;
   align-items: center;
   gap: 8px;
   cursor: pointer;
   margin-left: 8px;
}

.switch-label {
   font-family: var(--font-head);
   font-size: 0.7rem;
   font-weight: 700;
   text-transform: uppercase;
   color: var(--text);
   transition: color var(--transition);
   white-space: nowrap;
}

.switch-track {
   position: relative;
   width: 40px;
   height: 22px;
   background: var(--border);
   border-radius: 100px;
   transition: background var(--transition);
   flex-shrink: 0;
}

.switch-track.on {
   background: var(--accent);
}

.switch-thumb {
   position: absolute;
   top: 3px;
   left: 3px;
   width: 16px;
   height: 16px;
   background: #fff;
   border-radius: 50%;
   transition: transform 0.25s ease;
   box-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.switch-track.on .switch-thumb {
   transform: translateX(18px);
}

/* ── HEADER ───────────────────────────────────────── */
header {
   position: relative;
   overflow: hidden;
   text-align: center;
   padding: 80px 24px 50px;
   border-bottom: 1px solid var(--border);
   background-color: var(--bg-deep);
}

.header-bg {
   position: absolute;
   inset: 0;
   background: radial-gradient(ellipse at 50% 0%, rgba(255,0,51,0.12) 0%, transparent 70%);
   pointer-events: none;
}

[data-theme="light"] .header-bg {
   background: radial-gradient(ellipse at 50% 0%, rgba(27,59,111,0.1) 0%, transparent 70%);
}

.header-content { position: relative; z-index: 1; }

.label-text {
   font-family: var(--font-head);
   font-size: 0.7rem;
   letter-spacing: 0.2em;
   text-transform: uppercase;
   color: var(--accent);
   margin-bottom: 16px;
}

h1 {
   font-family: var(--font-head);
   font-size: clamp(1.6rem, 4vw, 2.8rem);
   font-weight: 700;
   text-transform: uppercase;
   color: var(--text);
   line-height: 1.1;
   margin-bottom: 12px;
   animation: fadeDown 0.8s ease both;
}

.accent { color: var(--accent2); }

.tagline {
   color: var(--text-muted);
   font-style: italic;
   font-size: 1rem;
   margin-bottom: 32px;
   opacity: 0;
   min-height: 1.7em;
}

nav {
   display: flex;
   justify-content: center;
   gap: 8px;
   flex-wrap: wrap;
   animation: fadeDown 0.8s 0.2s ease both;
}

/* Sticky state — added by JavaScript on scroll */
nav.sticky {
   position: fixed;
   top: 0;
   left: 0;
   right: 0;
   z-index: 998;
   padding: 12px 24px;
   background: rgba(10, 10, 10, 0.92);
   backdrop-filter: blur(12px);
   border-bottom: 1px solid var(--border);
}

[data-theme="light"] nav.sticky {
   background: rgba(255, 248, 238, 0.92);
}

nav a {
   padding: 8px 20px;
   border: 1px solid var(--border);
   border-radius: 100px;
   font-family: var(--font-head);
   font-size: 0.75rem;
   font-weight: 700;
   text-transform: uppercase;
   letter-spacing: 0.05em;
   color: var(--text);
   transition: border-color var(--transition), color var(--transition), background var(--transition);
}
nav a:hover {
   border-color: var(--accent);
   color: var(--accent);
   background: rgba(255,0,51,0.06);
}

[data-theme="light"] nav a:hover {
   background: rgba(27,59,111,0.06);
}

/* ── VIMEO EMBED ──────────────────────────────────── */
.vimeo-wrapper {
   position: relative;
   width: 100%;
   padding-bottom: 56.25%; /* 16:9 ratio */
   height: 0;
   margin-bottom: 28px;
   border-radius: var(--radius);
   overflow: hidden;
}

.vimeo-wrapper iframe {
   position: absolute;
   top: 0; left: 0;
   width: 100%;
   height: 100%;
   border-radius: var(--radius);
   border: none;
   margin: 0;
}

/* ── CLIENTS ──────────────────────────────────────── */
.clients-track-wrapper {
   overflow: hidden;
   width: 100%;
   margin-top: 8px;
   -webkit-mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
   mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
}

.clients-track {
   display: flex;
   align-items: center;
   gap: 60px;
   width: max-content;
   animation: scrollClients 12s linear infinite;
}

.clients-track img {
   height: 48px;
   width: auto;
   object-fit: contain;
   filter: grayscale(100%) brightness(0.6);
   opacity: 0.7;
   transition: filter var(--transition), opacity var(--transition);
   border-radius: 0;
   border: none;
   margin: 0;
}

.clients-track img:hover {
   filter: grayscale(0%) brightness(1);
   opacity: 1;
}

[data-theme="light"] .clients-track img {
   filter: grayscale(100%) brightness(0.3);
}

[data-theme="light"] .clients-track img:hover {
   filter: grayscale(0%) brightness(1);
}

@keyframes scrollClients {
   0%   { transform: translateX(0); }
   100% { transform: translateX(-25%); }
}

/* ── SECTIONS ─────────────────────────────────────── */
section {
   background-color: var(--bg-deep);
   margin: 28px 0;
   padding: 36px;
   border-radius: var(--radius);
   border: 1px solid var(--border);
   box-shadow: 0 4px 24px rgba(0,0,0,0.3);
   transition: background-color var(--transition), border-color var(--transition);
}

h2 {
   font-family: var(--font-head);
   font-size: 1.2rem;
   font-weight: 600;
   text-transform: uppercase;
   margin-bottom: 20px;
   color: var(--text);
   padding-bottom: 12px;
   border-bottom: 1px solid var(--border);
}

p { margin-bottom: 14px; color: var(--text); }

/* ── SKILLS SCROLL ────────────────────────────────── */
.skills-scroll-wrapper {
   overflow: hidden;
   height: 220px;
   margin-top: 24px;
   position: relative;
   -webkit-mask-image: linear-gradient(to bottom, transparent, black 20%, black 80%, transparent);
   mask-image: linear-gradient(to bottom, transparent, black 20%, black 80%, transparent);
}

.skills-track {
   display: flex;
   flex-direction: column;
   gap: 10px;
   will-change: transform;
}

.skills-track .skill-item {
   background: var(--bg-card);
   border: 1px solid var(--border);
   color: var(--text);
   padding: 8px 20px;
   height: 36px;
   border-radius: var(--radius);
   font-size: 0.78rem;
   font-family: var(--font-head);
   font-weight: 500;
   letter-spacing: 0.06em;
   text-transform: uppercase;
   text-align: center;
   white-space: nowrap;
   display: flex;
   align-items: center;
   justify-content: center;
   cursor: default;
   transition: border-color var(--transition), background var(--transition), color var(--transition);
   flex-shrink: 0;
}

.skills-track .skill-item:hover {
   border-color: var(--accent);
   background: rgba(255,0,51,0.07);
   color: var(--accent);
}

[data-theme="light"] .skills-track .skill-item:hover {
   background: rgba(27,59,111,0.07);
}

/* ── PROJECT CARDS ────────────────────────────────── */
#projectGrid {
   display: grid;
   gap: 20px;
}

.project-card {
   background: var(--bg-card);
   border: 1px solid var(--border);
   border-radius: var(--radius);
   padding: 20px;
   transition: border-color var(--transition), transform 0.2s, box-shadow 0.2s;
   animation: fadeUp 0.5s ease both;
}

.project-card:hover {
   border-color: var(--accent);
   transform: translateY(-3px);
   box-shadow: 0 8px 28px rgba(255,0,51,0.1);
}

[data-theme="light"] .project-card:hover {
   box-shadow: 0 8px 28px rgba(27,59,111,0.12);
}

.project-card h3 {
   font-family: var(--font-head);
   font-size: 1rem;
   font-weight: 700;
   text-transform: uppercase;
   margin-bottom: 8px;
   color: var(--text);
}

.project-card p {
   font-size: 0.92rem;
   color: var(--text-muted);
   margin-bottom: 14px;
}

.project-card .tag {
   display: inline-block;
   font-size: 0.7rem;
   font-family: var(--font-head);
   font-weight: 500;
   letter-spacing: 0.1em;
   text-transform: uppercase;
   padding: 3px 10px;
   border-radius: 4px;
   background: rgba(255,0,51,0.08);
   border: 1px solid rgba(255,0,51,0.3);
   color: var(--accent);
   margin-bottom: 12px;
}

[data-theme="light"] .project-card .tag {
   background: rgba(27,59,111,0.08);
   border: 1px solid rgba(27,59,111,0.3);
}

iframe {
   width: 100%;
   height: 280px;
   border-radius: 8px;
   border: none;
   margin-top: 10px;
   display: block;
}

/* ── CONTACT FORM ─────────────────────────────────── */
.form-group {
   display: flex;
   flex-direction: column;
   margin-top: 14px;
}

#contactForm input,
#contactForm textarea {
   padding: 12px 16px;
   border-radius: var(--radius);
   border: 1px solid var(--border);
   background-color: var(--bg-card);
   color: var(--text);
   font-size: 0.95rem;
   font-family: var(--font-body);
   outline: none;
   transition: border-color var(--transition), background var(--transition);
}

#contactForm input:focus,
#contactForm textarea:focus {
   border-color: var(--accent);
}

#contactForm input.invalid,
#contactForm textarea.invalid {
   border-color: #f87171;
}

.form-error {
   color: #f87171;
   font-size: 0.8rem;
   margin-top: 5px;
   display: none;
}

.form-error.visible { display: block; }

.btn-submit {
   margin-top: 18px;
   padding: 12px 28px;
   background-color: var(--accent);
   color: #ffffff;
   border: none;
   border-radius: var(--radius);
   font-family: var(--font-head);
   font-weight: 700;
   font-size: 0.85rem;
   text-transform: uppercase;
   letter-spacing: 0.05em;
   cursor: pointer;
   transition: background-color var(--transition), transform 0.15s, opacity var(--transition);
}

.btn-submit:hover { transform: translateY(-1px); opacity: 0.9; }
.btn-submit:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.form-success {
   display: none;
   margin-top: 14px;
   color: var(--accent);
   font-size: 0.9rem;
   font-family: var(--font-head);
   text-transform: uppercase;
   letter-spacing: 0.05em;
}

.form-success.visible { display: block; }

/* ── SCROLL PROGRESS BAR ──────────────────────────── */
.scroll-progress-track {
   position: fixed;
   right: 0;
   top: 0;
   width: 6px;
   height: 100vh;
   background: var(--border);
   z-index: 997;
}

.scroll-progress-fill {
   width: 100%;
   height: 0%;
   background: var(--accent);
   transition: height 0.05s linear;
   box-shadow: 0 0 14px 2px rgba(255,0,51,0.7);
}

[data-theme="light"] .scroll-progress-fill {
   box-shadow: 0 0 14px 2px rgba(27,59,111,0.5);
}

/* ── FOOTER ───────────────────────────────────────── */
footer {
   text-align: center;
   padding: 24px;
   background-color: var(--bg-deep);
   border-top: 1px solid var(--border);
   margin-top: 20px;
   color: var(--text-muted);
   font-size: 0.85rem;
}

/* ── ANIMATIONS ───────────────────────────────────── */
@keyframes fadeDown {
   from { opacity: 0; transform: translateY(-18px); }
   to   { opacity: 1; transform: translateY(0); }
}

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

.reveal {
   opacity: 0;
   transform: translateY(28px);
   transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
   opacity: 1;
   transform: translateY(0);
}