:root {
    color-scheme: light;
    --bg: #f4f7fb;
    --bg-2: #eaf2fb;
    --card: #ffffff;
    --text: #0f172a;
    --muted: #5b6b82;
    --line: #e2e8f0;
    --brand: #2563eb;
    --brand-2: #4f46e5;
    --brand-soft: #eff4ff;
    --ok-bg: #ecfdf5;
    --ok-line: #a7f3d0;
    --ok-text: #047857;
    --danger: #dc2626;
    --danger-soft: #fef2f2;
    --shadow: 0 10px 30px -12px rgba(15, 23, 42, 0.18);
    --spark: rgba(37, 99, 235, 0.18);

    --s1: 4px;
    --s2: 8px;
    --s3: 12px;
    --s4: 16px;
    --s5: 24px;
    --s6: 32px;
    --s7: 48px;

    --r-sm: 10px;
    --r-md: 14px;
    --r-lg: 18px;
    --r-pill: 999px;

    --tap: 44px;

    --font-display: "Sora", system-ui, -apple-system, sans-serif;
    --font-body: "Inter", system-ui, -apple-system, sans-serif;

    --fs-xs: 0.75rem;
    --fs-sm: 0.875rem;
    --fs-base: 1rem;
    --fs-md: 1.125rem;
    --fs-lg: 1.5rem;
    --fs-xl: 2rem;
    --fs-2xl: clamp(2rem, 5vw + 1rem, 3.25rem);
    --fs-3xl: clamp(2.75rem, 5vw, 4rem);

    --lh-tight: 1.15;
    --lh-body: 1.6;
}

[data-theme="dark"] {
    color-scheme: dark;
    --bg: #0a0f1c;
    --bg-2: #0e1424;
    --card: #131a2b;
    --text: #e8edf6;
    --muted: #93a1bd;
    --line: #243049;
    --brand: #60a5fa;
    --brand-2: #818cf8;
    --brand-soft: #16223c;
    --ok-bg: #06281f;
    --ok-line: #0f5132;
    --ok-text: #6ee7b7;
    --danger: #f87171;
    --danger-soft: #2a1620;
    --shadow: 0 14px 40px -16px rgba(0, 0, 0, 0.6);
}

* { box-sizing: border-box; }

.skip-link {
    position: absolute;
    left: var(--s3);
    top: -100%;
    z-index: 100;
    background: var(--card);
    color: var(--text);
    border: 1px solid var(--brand);
    border-radius: var(--r-sm);
    padding: 10px 14px;
    font: inherit;
    font-weight: 600;
    text-decoration: none;
    transition: top 0.15s ease;
}
.skip-link:focus { top: var(--s3); }

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}

.avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--r-pill);
    background: var(--brand);
    color: #fff;
    display: grid;
    place-items: center;
    font-weight: 700;
    font-size: var(--fs-sm);
    overflow: hidden;
    flex-shrink: 0;
    cursor: pointer;
    border: none;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }
.avatar:active { transform: scale(0.96); }

.topbar {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: var(--s3);
    padding: calc(var(--s4) + env(safe-area-inset-top, 0px)) var(--s5) var(--s4);
    max-width: 1200px;
    margin: 0 auto;
}
.brand {
    display: flex;
    align-items: center;
    gap: var(--s2);
    font-weight: 800;
    font-size: var(--fs-md);
    letter-spacing: -0.02em;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}
.logo {
    width: 32px;
    height: 32px;
    border-radius: var(--r-sm);
    background: var(--brand);
    display: grid;
    place-items: center;
    color: #fff;
    font-weight: 800;
    font-size: var(--fs-base);
}
.topbar-actions { display: flex; align-items: center; gap: var(--s3); margin-left: auto; }
.gsi-wrap { display: inline-flex; align-items: center; }
.gsi-wrap > div { margin: 0 !important; }

:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; border-radius: var(--r-sm); }
.input:focus-visible, .search:focus-visible { outline: none; }
.avatar:focus-visible { outline-offset: 2px; }

.theme-switch { position: relative; width: 48px; height: 28px; display: inline-block; flex-shrink: 0; }
.theme-switch input { opacity: 0; width: 0; height: 0; }
.slider {
    position: absolute; inset: 0; border-radius: var(--r-pill);
    background: #cbd5e1; cursor: pointer; transition: background 0.2s ease, border-color 0.2s ease; border: 1px solid var(--line);
}
.slider::before {
    content: ""; position: absolute; width: 20px; height: 20px; left: 3px; top: 3px;
    border-radius: 50%; background: #fff; transition: transform 0.2s ease, box-shadow 0.2s ease; box-shadow: 0 1px 3px rgba(0,0,0,0.25);
}
.slider::after { content: "\2600"; position: absolute; right: 7px; top: 50%; transform: translateY(-50%); font-size: 11px; color: #334155; }
.theme-switch input:checked + .slider { background: linear-gradient(135deg, var(--brand), var(--brand-2)); }
.theme-switch input:checked + .slider::before { transform: translateX(20px); }
.theme-switch input:checked + .slider::after { content: "\263E"; right: auto; left: 7px; color: #e8edf6; }

.btn {
    border: 1px solid var(--line); background: var(--card); color: var(--text);
    border-radius: var(--r-sm); padding: 10px 14px; font: inherit; font-weight: 600;
    cursor: pointer;
    transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease,
        box-shadow 0.15s ease, filter 0.15s ease, transform 0.15s ease;
    white-space: nowrap; text-decoration: none;
    min-height: var(--tap); display: inline-flex; align-items: center; justify-content: center;
    -webkit-tap-highlight-color: transparent;
}
.btn:hover { border-color: var(--brand); }
.btn-primary { background: var(--brand); border: none; color: #fff; }
.btn-primary:hover { filter: brightness(1.08); box-shadow: 0 6px 16px -8px rgba(37, 99, 235, 0.55); }
[data-theme="dark"] .btn-primary { background: #1d4ed8; }
.btn-danger { color: var(--danger); border-color: var(--line); }
.btn-danger:hover { background: var(--danger-soft); border-color: var(--danger); }
.btn.tiny { padding: 0 12px; min-height: 38px; font-size: var(--fs-sm); }

.sheet-backdrop {
    position: fixed; inset: 0; background: rgba(15, 23, 42, 0.45);
    opacity: 0; visibility: hidden; transition: opacity 0.25s ease, visibility 0.25s ease;
    z-index: 70; -webkit-tap-highlight-color: transparent;
}
.sheet-backdrop.open { opacity: 1; visibility: visible; }
.sheet {
    position: fixed; left: 0; right: 0; bottom: 0;
    background: var(--card); z-index: 80;
    border-radius: var(--r-lg) var(--r-lg) 0 0;
    padding: var(--s2) var(--s4) calc(var(--s5) + env(safe-area-inset-bottom, 0px));
    transform: translateY(100%); transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1);
    box-shadow: 0 -8px 40px -12px rgba(15, 23, 42, 0.3);
    max-width: 520px; margin: 0 auto;
}
.sheet.open { transform: translateY(0); }
.sheet-grab { width: 40px; height: 4px; border-radius: var(--r-pill); background: var(--line); margin: var(--s2) auto var(--s3); }
.sheet-header { display: flex; align-items: center; gap: var(--s3); padding: var(--s2) var(--s1) var(--s4); }
.sheet-header .avatar { width: 48px; height: 48px; font-size: var(--fs-md); cursor: default; }
.sheet-name { font-weight: 700; font-size: var(--fs-base); }
.sheet-email { color: var(--muted); font-size: var(--fs-sm); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sheet-list { display: flex; flex-direction: column; gap: var(--s1); }
.sheet-item {
    display: flex; align-items: center; gap: var(--s3);
    width: 100%; text-align: left; background: none; border: none;
    color: var(--text); font: inherit; font-weight: 600; font-size: var(--fs-base);
    padding: var(--s3) var(--s3); border-radius: var(--r-md); cursor: pointer;
    min-height: var(--tap); -webkit-tap-highlight-color: transparent; transition: background 0.15s ease;
}
.sheet-item:hover { background: var(--brand-soft); }
.sheet-item .ic { width: 20px; text-align: center; opacity: 0.8; }
.sheet-item.logout { color: var(--danger); }
.sheet-item.logout:hover { background: var(--danger-soft); }
.sheet-divider { height: 1px; background: var(--line); margin: var(--s2) 0; }

.gsi-sheet { display: none; justify-content: center; padding: var(--s2) 0 var(--s3); }
.gsi-sheet > div { margin: 0 auto !important; }
.sheet-theme { justify-content: space-between; }

.toast {
    position: fixed; left: 50%; bottom: calc(var(--s5) + env(safe-area-inset-bottom, 0px));
    transform: translate(-50%, 12px);
    background: #0f172a; color: #fff; padding: 12px 18px; border-radius: var(--r-md);
    opacity: 0; transition: opacity 0.25s ease, transform 0.25s ease; pointer-events: none;
    font-size: var(--fs-sm); box-shadow: var(--shadow); z-index: 90; max-width: 90vw;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.modal { position: fixed; inset: 0; display: none; align-items: center; justify-content: center; background: rgba(0,0,0,0.45); padding: var(--s4); z-index: 85; }
.modal.open { display: flex; }
.modal-box { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: var(--s5); width: min(380px, 100%); }
.modal-title { font-weight: 700; font-size: var(--fs-md); margin: 0; }
.modal-text { margin: var(--s3) 0 var(--s5); color: var(--muted); font-size: var(--fs-base); line-height: var(--lh-body); }
.modal-actions { display: flex; gap: var(--s2); justify-content: flex-end; }
.modal-actions .btn { flex: 1; }
.modal-error { margin: var(--s2) 0 0; color: var(--danger); font-size: var(--fs-sm); line-height: 1.45; }
.modal-box .input + .modal-actions { margin-top: var(--s4); }
/* Sign-in popup sits above the dashboard auth gate (z-index 960). */
.modal-auth { z-index: 970; }
.gsi-signin { display: flex; justify-content: center; padding: var(--s2) 0; }
.gsi-signin > div { margin: 0 auto !important; }

.field-label { display: block; font-size: var(--fs-xs); color: var(--muted); font-weight: 600; margin-bottom: var(--s2); }
.input {
    width: 100%; border: 1.5px solid var(--line); border-radius: var(--r-md);
    padding: 14px 16px; background: var(--bg); color: var(--text); font: inherit; font-size: var(--fs-base);
    transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
    min-height: var(--tap);
}
.input::placeholder { color: var(--muted); }
.input:focus { outline: none; border-color: var(--brand); background: var(--card); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15); }
[data-theme="dark"] .input { background: #0c1322; }

@media (min-width: 560px) {
    .logo { width: 34px; height: 34px; }
}

.desktop-only { display: none; }
@media (min-width: 761px) {
    .desktop-only { display: inline-flex; }
}

@media (max-width: 760px) {
    .topbar { flex-wrap: nowrap; }
    .topbar-actions { flex-wrap: nowrap; }
    #gsi-button-container { display: none; }
    .topbar .theme-switch { display: none; }
    #avatarBtn { display: grid !important; }
    .gsi-sheet { display: flex; }
}

@media (min-width: 761px) {
    .sheet {
        left: auto; right: var(--s5); bottom: auto; top: 64px;
        transform: translateY(-8px); opacity: 0; visibility: hidden;
        border-radius: var(--r-lg); padding: var(--s2);
        box-shadow: var(--shadow); max-width: 280px;
    }
    .sheet.open { transform: translateY(0); opacity: 1; visibility: visible; }
    .sheet-grab { display: none; }
    .sheet-theme { display: none; }
}

/* Footer: brand serif font (Playfair Display) + portfolio CTA — font, link and
   welcome line taken from the project BMW footer (ecom-seven-sand.vercel.app). */
footer {
    font-family: var(--font-body);
    margin-top: var(--s6); /* extra drop below the content so it reads as a footer, not a caption */
}
/* Inset hairline above the footer text: centered, with breathing room on both
   sides instead of a full edge-to-edge rule. */
footer::before {
    content: "";
    display: block;
    width: min(460px, calc(100% - 64px));
    margin: 0 auto var(--s5);
    border-top: 1px solid var(--line);
}
.foot-cta {
    display: flex; /* block-level: portfolio CTA sits on its own lines (3 & 4) */
    flex-direction: column;
    align-items: center;
    gap: 4px;
    margin-top: var(--s3);
    text-decoration: none;
    font-family: "Playfair Display", Georgia, serif; /* portfolio lines keep the BMW font */
}
.foot-cta-kicker {
    font-size: 10px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--muted);
}
.foot-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--s2);
    margin-top: var(--s3);
    font-size: var(--fs-xs);
}
.foot-links a { color: var(--muted); text-decoration: none; }
.foot-links a:hover, .foot-links a:focus-visible { color: var(--brand); text-decoration: underline; }
.foot-links span { color: var(--line); }
.foot-cta-link {
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--text);
    text-decoration: underline;
    text-decoration-color: color-mix(in srgb, var(--brand) 40%, transparent);
    text-underline-offset: 4px;
    transition: color 0.15s ease, text-decoration-color 0.15s ease;
}
.foot-cta:hover .foot-cta-link,
.foot-cta:focus-visible .foot-cta-link {
    color: var(--brand);
    text-decoration-color: var(--brand);
}