:root {
    color-scheme: light;
    --page-bg: #e8efec;
    --surface: #e8efec;
    --surface-base: #d4e0db;
    --line: #b8c9c2;
    --shadow-dark: #bfcbc5;
    --ink: #24443d;
    --muted: #607a72;
    --accent: #397f70;
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --page-bg: #172421;
    --surface: #20342e;
    --surface-base: #294239;
    --line: #405b50;
    --shadow-dark: #101a17;
    --ink: #e7f2ec;
    --muted: #a4bdb2;
    --accent: #91cbb3;
}

body {
    min-height: 100vh;
    background-color: var(--page-bg);
    display: flex;
    flex-direction: column;
    margin: 0;
    color: var(--ink);
    font-family: "Poppins", "Noto Sans Devanagari", sans-serif;
}

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    width: 100%;
    box-sizing: border-box;
    padding: 1rem clamp(1rem, 5vw, 2rem);
    border-bottom: 1px solid var(--line);
}

.brand {
    color: var(--ink);
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.25;
    margin: 0;
}

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

.site-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 1rem;
    margin-left: auto;
}

.site-nav a,
.site-nav button {
    padding: 0.55rem 0.85rem;
    border: 1px solid var(--line);
    border-radius: 0.65rem;
    background: color-mix(in srgb, var(--surface) 75%, transparent);
    color: var(--accent);
    font: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
}

.site-nav a[aria-current="page"] { background: var(--surface-base); color: var(--ink); }
.site-nav a:hover,
.site-nav button:hover { background: var(--surface-base); }

.counter-main {
    display: flex;
    flex: 1;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    width: min(100% - 2rem, 34rem);
    margin: 0 auto;
    padding: 2rem 0;
    text-align: center;
}

.mantra-text {
    max-width: 100%;
    margin: 0 0 0.5rem;
    color: var(--muted);
    font-size: 0.95rem;
    overflow-wrap: anywhere;
    -webkit-tap-highlight-color: transparent;
    -webkit-user-select: none;
    user-select: none;
}

.neumorphic-3d-btn {
    padding: 0;
    border: none;
    width: min(82vw, 20rem);
    aspect-ratio: 1;
    background: var(--surface-base);
    border-radius: 50%;
    cursor: pointer;
    touch-action: manipulation;
    box-shadow:
        9px 9px 18px var(--shadow-dark),
        -9px -9px 18px color-mix(in srgb, var(--surface) 95%, white);
    transition: box-shadow 150ms ease;
}

.btn-content {
    display: grid;
    width: 100%;
    height: 100%;
    place-content: center;
    align-content: center;
    gap: 0.3rem;
    border: 1px solid color-mix(in srgb, var(--ink) 10%, transparent);
    border-radius: 50%;
    background: var(--surface);
    color: var(--ink);
    font-size: 1.1rem;
    font-weight: 700;
    transform: translateY(-8px);
    transition: transform 100ms ease, background-color 100ms ease;
}

.counter-value {
    color: var(--accent);
    font-size: 4rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    line-height: 1;
    -webkit-user-select: none;
    user-select: none;
}

.counter-prompt { color: var(--muted); font-size: 0.95rem; }
.neumorphic-3d-btn:hover .btn-content { transform: translateY(-10px); }

.neumorphic-3d-btn.is-pressed .btn-content {
    transform: translateY(-2px);
    background: var(--surface-base);
}

.neumorphic-3d-btn:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 6px;
}

.neumorphic-3d-btn:active .btn-content {
    transform: translateY(-2px);
    background: var(--surface-base);
}

.reset-button {
    margin-top: 0.5rem;
    padding: 0.7rem 1.2rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: transparent;
    color: var(--muted);
    font: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    -webkit-user-select: none;
    user-select: none;
}

.reset-button:hover { background: color-mix(in srgb, var(--surface) 70%, transparent); }

.appearance-dialog {
    width: min(24rem, calc(100% - 2rem));
    padding: 0;
    border: 1px solid var(--line);
    border-radius: 1rem;
    background: var(--surface);
    color: var(--ink);
    box-shadow: 0 24px 64px rgb(0 0 0 / 25%);
}

.appearance-dialog::backdrop { background: rgb(0 0 0 / 48%); }

.dialog-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--line);
}

.dialog-heading h2 { margin: 0; font-size: 1.1rem; }

.dialog-close,
.theme-choice {
    min-height: 44px;
    border: 1px solid var(--line);
    border-radius: 0.65rem;
    background: var(--surface-base);
    color: var(--ink);
    font: inherit;
    cursor: pointer;
}

.dialog-close { width: 44px; font-size: 1.25rem; }
.theme-choices { display: flex; gap: 0.75rem; padding: 1.25rem; }
.theme-choice { flex: 1; }
.theme-choice[aria-pressed="true"] { outline: 2px solid var(--accent); outline-offset: 2px; }

@media (max-width: 360px) {
    .site-nav { gap: 0.65rem; }
    .site-nav a,
    .site-nav button { font-size: 0.8rem; }
}

@media (min-width: 640px) {
    .brand { font-size: 1.5rem; }
}

@media (min-width: 768px) {
    .brand { font-size: 2.25rem; }
}