:root {
    --c-bg: #F4F4F4;
    --c-card: #FFFFFF;
    --c-text-primary: #0D0D0D;
    --c-text-secondary: #888888;

    --c-accent: #6CEFA0;

    --c-accent-blue: #6CDDEF;
    --c-accent-purple: #B06CEF;
    --c-accent-orange: #EF9B6C;

    --font-data: 'JetBrains Mono', monospace;
    --font-ui: 'Space Grotesk', sans-serif;

    --radius: 2px;
    --shadow: 0 4px 20px rgba(0,0,0,0.04);
    --border: 1px solid rgba(0,0,0,0.05);

    --c-input-border: #E0E0E0;
    --c-habit-bg: #FAFAFA;
    --c-habit-hover: #F0F0F0;
    --c-habit-completed-bg: #FFFFFF;
    --c-checkbox-border: #DDD;
    --c-day-cell-bg: #F0F0F0;
    --c-bar-bg: #EEEEEE;
    --c-code-texture: #EEE;
    --c-today-border: #EEE;
    --c-skeleton-from: #F0F0F0;
    --c-skeleton-mid: #E0E0E0;
    --c-popover-bg: rgba(255, 255, 255, 0.98);
    --c-popover-border: rgba(0, 0, 0, 0.1);
    --c-heatmap-toggle-bg: rgba(0, 0, 0, 0.03);
    --c-heatmap-toggle-hover: rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] {
    --c-bg: #121212;
    --c-card: #1E1E1E;
    --c-text-primary: #E8E8E8;
    --c-text-secondary: #999999;

    --c-accent: #6CEFA0;
    --c-accent-blue: #6CDDEF;
    --c-accent-purple: #B06CEF;
    --c-accent-orange: #EF9B6C;

    --shadow: 0 4px 20px rgba(0,0,0,0.2);
    --border: 1px solid rgba(255,255,255,0.06);

    --c-input-border: #333;
    --c-habit-bg: #252525;
    --c-habit-hover: #2A2A2A;
    --c-habit-completed-bg: #1E1E1E;
    --c-checkbox-border: #444;
    --c-day-cell-bg: #252525;
    --c-bar-bg: #2A2A2A;
    --c-code-texture: #2A2A2A;
    --c-today-border: #333;
    --c-skeleton-from: #252525;
    --c-skeleton-mid: #303030;
    --c-popover-bg: rgba(30, 30, 30, 0.98);
    --c-popover-border: rgba(255, 255, 255, 0.1);
    --c-heatmap-toggle-bg: rgba(255, 255, 255, 0.05);
    --c-heatmap-toggle-hover: rgba(255, 255, 255, 0.08);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* ── Base / Mobile (320px+) ─────────────────────────── */

body {
    background-color: var(--c-bg);
    color: var(--c-text-primary);
    font-family: var(--font-ui);
    min-height: 100vh;
    overflow-x: hidden;
    overflow-y: auto;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 16px;
}

/* Typography */

.label-micro {
    font-family: var(--font-data);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--c-text-secondary);
    margin-bottom: 8px;
    display: block;
}

.data-huge {
    font-family: var(--font-ui);
    font-size: 32px;
    font-weight: 300;
    line-height: 1;
    letter-spacing: -1px;
}

.data-large {
    font-family: var(--font-ui);
    font-size: 22px;
    font-weight: 400;
    letter-spacing: -0.5px;
}

.data-mono {
    font-family: var(--font-data);
    font-size: 14px;
}

/* Dashboard Layout - mobile: single column */

.dashboard-container {
    width: 100%;
    max-width: 1400px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Panel (card) */

.panel {
    background: var(--c-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: visible;
}

/* Left Column: Input */

.col-input {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.habit-creation {
    height: auto;
}

.input-group {
    margin-bottom: 20px;
}

input[type="text"] {
    width: 100%;
    border: none;
    border-bottom: 1px solid var(--c-input-border);
    font-family: var(--font-data);
    font-size: 16px; /* 16px prevents iOS zoom on focus */
    padding: 10px 0;
    outline: none;
    transition: border-color 0.2s;
    -webkit-appearance: none;
    border-radius: 0;
}
input[type="text"]:focus {
    border-bottom-color: var(--c-text-primary);
}

.color-selector {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

.color-opt {
    width: 44px;
    height: 44px;
    border-radius: 2px;
    cursor: pointer;
    opacity: 1;
    transition: all 0.2s;
    touch-action: manipulation;
    border: 2px solid rgba(0, 0, 0, 0.1);
    padding: 0;
    appearance: none;
    -webkit-appearance: none;
}
.color-opt.active {
    opacity: 1;
    transform: scale(1.1);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    border-color: rgba(0,0,0,0.2);
}

.color-picker-opt {
    border: 2px dashed #CCC;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--custom-color, linear-gradient(135deg, #FF6B6B 0%, #4ECDC4 50%, #45B7D1 100%));
}
.color-picker-opt.active {
    border-style: solid;
    border-color: var(--c-text-primary);
}
.color-picker-opt svg {
    color: #666;
}
.color-picker-opt.active svg {
    color: var(--c-text-primary);
}

.btn-add {
    background: var(--c-text-primary);
    color: white;
    border: none;
    padding: 14px;
    font-family: var(--font-data);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
    width: 100%;
    cursor: pointer;
    border-radius: var(--radius);
    min-height: 44px;
    touch-action: manipulation;
}
.btn-add:hover {
    opacity: 0.9;
}

/* Center Column: Visualization */

.col-viz {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Stats Row - mobile: stacked vertically */

.stats-row {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.stat-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 100px;
}

.chart-mini {
    display: flex;
    align-items: flex-end;
    gap: 4px;
    height: 40px;
    width: 100%;
}
.bar {
    flex: 1;
    background: var(--c-bar-bg);
    transition: height 0.5s ease;
}
.bar.fill {
    background: var(--c-accent);
}

/* Heatmap */

.heatmap-container {
    display: flex;
    flex-direction: column;
    position: relative;
}

.heatmap-month-labels {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 2px;
    margin-bottom: 8px;
}

.month-label {
    font-family: var(--font-data);
    font-size: 10px;
    color: var(--c-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.heatmap-view-toggle {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    background: var(--c-heatmap-toggle-bg);
    padding: 4px;
    border-radius: 4px;
    width: fit-content;
}

.view-toggle-btn {
    font-family: var(--font-data);
    font-size: 12px;
    padding: 10px 16px;
    border: none;
    background: transparent;
    color: var(--c-text-secondary);
    cursor: pointer;
    border-radius: 2px;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
    min-height: 44px;
    touch-action: manipulation;
}

.view-toggle-btn:hover {
    background: var(--c-heatmap-toggle-hover);
    color: var(--c-text-primary);
}

.view-toggle-btn.active {
    background: var(--c-accent);
    color: white;
}

.heatmap-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    grid-template-rows: repeat(7, 1fr);
    gap: 3px;
    min-height: 120px;
    padding-top: 16px;
}

.day-cell {
    background: var(--c-day-cell-bg);
    border-radius: 1px;
    position: relative;
    cursor: pointer;
    transition: transform 0.1s;
    aspect-ratio: 1;
    touch-action: manipulation;
}
.day-cell:hover {
    z-index: 10;
    border: 2px solid var(--c-text-primary);
}

/* Popover */

.popover {
    position: fixed;
    background: var(--c-popover-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--c-popover-border);
    padding: 20px;
    min-width: 260px;
    max-width: 300px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.15s ease;
    z-index: 1000;
    border-radius: 4px;
    font-size: 15px;
}
.day-cell:hover .popover {
    opacity: 1;
}

/* Right Column: Today's Habits */

.col-today {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.today-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--c-today-border);
    padding-bottom: 16px;
}

.habit-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    overflow-y: auto;
    flex: 1;
}

.habit-item {
    display: flex;
    align-items: center;
    padding: 16px;
    background: var(--c-habit-bg);
    border-radius: var(--radius);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid transparent;
    cursor: pointer;
    min-height: 44px;
    touch-action: manipulation;
}

.habit-item:hover {
    background: var(--c-habit-hover);
}

.habit-item.completed {
    background: var(--c-habit-completed-bg);
    border-color: var(--active-color, var(--c-accent));
}

.checkbox {
    width: 44px;
    height: 44px;
    min-width: 44px;
    border: 2px solid var(--c-checkbox-border);
    margin-right: 16px;
    border-radius: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    touch-action: manipulation;
}

.habit-item.completed .checkbox {
    background: var(--active-color, var(--c-accent));
    border-color: var(--active-color, var(--c-accent));
}

.habit-item.completed .habit-name {
    color: var(--c-text-secondary);
    text-decoration: line-through;
}

.habit-info {
    flex: 1;
    min-width: 0;
}

.habit-name {
    font-family: var(--font-data);
    font-size: 14px;
    color: var(--c-text-primary);
    margin-bottom: 4px;
    word-break: break-word;
}

.habit-streak {
    font-size: 10px;
    color: var(--c-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Code texture decoration */

.code-texture {
    position: absolute;
    right: 20px;
    top: 20px;
    font-family: var(--font-data);
    font-size: 8px;
    line-height: 1.4;
    color: var(--c-code-texture);
    text-align: right;
    pointer-events: none;
    user-select: none;
    z-index: 0;
}

/* Color utilities */

.bg-mint, button.bg-mint { background-color: var(--c-accent) !important; }
.bg-blue, button.bg-blue { background-color: var(--c-accent-blue) !important; }
.bg-purple, button.bg-purple { background-color: var(--c-accent-purple) !important; }
.bg-orange, button.bg-orange { background-color: var(--c-accent-orange) !important; }


/* ── Tablet (768px+) ─────────────────────────────────── */

@media (min-width: 768px) {
    body {
        padding: 24px;
    }

    .dashboard-container {
        gap: 24px;
    }

    .panel {
        padding: 24px;
    }

    .data-huge {
        font-size: 38px;
    }

    .data-large {
        font-size: 26px;
    }

    .col-input {
        gap: 24px;
    }

    /* Stats row: horizontal 3 columns on tablet */
    .stats-row {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr;
        gap: 24px;
        flex-direction: unset;
    }

    .stat-card {
        min-height: 120px;
    }

    .col-viz {
        gap: 24px;
    }

    /* Heatmap: 26 weeks on tablet */
    .heatmap-grid {
        grid-template-columns: repeat(26, 1fr);
        gap: 3px;
        min-height: 160px;
    }

    .heatmap-month-labels {
        grid-template-columns: repeat(26, 1fr);
    }

    .color-opt {
        width: 36px;
        height: 36px;
    }

    .checkbox {
        width: 36px;
        height: 36px;
        min-width: 36px;
    }
}


/* ── Desktop (1024px+) ───────────────────────────────── */

@media (min-width: 1024px) {
    body {
        height: 100vh;
        overflow: hidden;
        align-items: center;
        padding: 0;
    }

    .dashboard-container {
        width: 90vw;
        height: 85vh;
        display: grid;
        grid-template-columns: 320px 1fr 380px;
        gap: 24px;
    }

    .data-huge {
        font-size: 42px;
    }

    .data-large {
        font-size: 28px;
    }

    .col-viz {
        display: grid;
        grid-template-rows: auto 1fr;
    }

    .stats-row {
        height: 120px;
    }

    /* Heatmap: full 53 weeks on desktop */
    .heatmap-grid {
        grid-template-columns: repeat(53, 1fr);
        gap: 4px;
        height: 100%;
        min-height: unset;
    }

    .heatmap-month-labels {
        grid-template-columns: repeat(53, 1fr);
    }

    .day-cell {
        aspect-ratio: unset;
    }

    .color-opt {
        width: 36px;
        height: 36px;
    }

    .checkbox {
        width: 20px;
        height: 20px;
        min-width: 20px;
    }

    .code-texture {
        right: 24px;
        top: 24px;
    }

    input[type="text"] {
        font-size: 14px;
        padding: 8px 0;
    }
}


/* ── Animations & Micro-Interactions ────────────────── */

/* --- Keyframes --- */

@keyframes slide-in {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes checkbox-bounce {
    0%   { transform: scale(1); }
    30%  { transform: scale(0.85); }
    60%  { transform: scale(1.15); }
    80%  { transform: scale(0.97); }
    100% { transform: scale(1); }
}

@keyframes skeleton-loading {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

@keyframes toast-in-right {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes toast-out-right {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

@keyframes toast-in-bottom {
    from {
        opacity: 0;
        transform: translateY(100%);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes toast-out-bottom {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(100%);
    }
}

@keyframes modal-overlay-in {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes modal-content-in {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(8px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

@keyframes fade-in {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* --- Habit item slide-in with staggered delays --- */

.habit-item {
    animation: slide-in 0.4s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.habit-item:nth-child(1)  { animation-delay: 0.00s; }
.habit-item:nth-child(2)  { animation-delay: 0.04s; }
.habit-item:nth-child(3)  { animation-delay: 0.08s; }
.habit-item:nth-child(4)  { animation-delay: 0.12s; }
.habit-item:nth-child(5)  { animation-delay: 0.16s; }
.habit-item:nth-child(6)  { animation-delay: 0.20s; }
.habit-item:nth-child(7)  { animation-delay: 0.24s; }
.habit-item:nth-child(8)  { animation-delay: 0.28s; }
.habit-item:nth-child(9)  { animation-delay: 0.32s; }
.habit-item:nth-child(10) { animation-delay: 0.36s; }

/* --- Panel fade-in --- */

.panel {
    animation: fade-in 0.5s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.col-input .panel:nth-child(1) { animation-delay: 0.0s; }
.col-input .panel:nth-child(2) { animation-delay: 0.1s; }
.col-viz .panel:nth-child(1)   { animation-delay: 0.05s; }
.col-viz .panel:nth-child(2)   { animation-delay: 0.15s; }

.col-today {
    animation: fade-in 0.5s cubic-bezier(0.16, 1, 0.3, 1) 0.1s both;
}

/* --- Button press effects --- */

.btn-add,
.view-toggle-btn {
    transition: transform 0.15s cubic-bezier(0.16, 1, 0.3, 1),
                opacity 0.2s ease,
                background 0.2s ease,
                color 0.2s ease;
}

.btn-add:active,
.view-toggle-btn:active {
    transform: scale(0.96);
}

/* --- Checkbox bounce on completion --- */

.habit-item.completed .checkbox {
    animation: checkbox-bounce 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Smooth transitions for interactive elements --- */

.habit-item {
    transition: background 0.25s cubic-bezier(0.16, 1, 0.3, 1),
                border-color 0.25s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.2s cubic-bezier(0.16, 1, 0.3, 1),
                box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.habit-item:hover {
    transform: translateX(4px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.color-opt:hover {
    opacity: 0.85;
    transform: scale(1.15);
}

.color-opt:active {
    transform: scale(0.95);
}

/* --- Focus indicators --- */

input[type="text"]:focus {
    border-bottom-color: var(--c-text-primary);
    box-shadow: 0 1px 0 0 var(--c-text-primary);
}

.btn-add:focus-visible,
.view-toggle-btn:focus-visible {
    outline: 2px solid var(--c-accent);
    outline-offset: 2px;
}

.habit-item:focus-visible {
    outline: 2px solid var(--c-accent);
    outline-offset: 2px;
    border-color: var(--c-accent);
}

.day-cell:focus-visible {
    outline: 2px solid var(--c-accent);
    outline-offset: 1px;
}

/* --- Skeleton loading --- */

.skeleton {
    background: linear-gradient(
        90deg,
        var(--c-skeleton-from) 25%,
        var(--c-skeleton-mid) 50%,
        var(--c-skeleton-from) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease infinite;
    border-radius: var(--radius);
    color: transparent !important;
    pointer-events: none;
    user-select: none;
}

.skeleton * {
    visibility: hidden;
}

/* --- Toast notifications --- */

.toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.toast {
    background: rgba(13, 13, 13, 0.92);
    backdrop-filter: blur(8px);
    color: white;
    padding: 12px 20px;
    border-radius: var(--radius);
    font-family: var(--font-data);
    font-size: 13px;
    pointer-events: auto;
    animation: toast-in-right 0.35s cubic-bezier(0.16, 1, 0.3, 1) both;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.toast.toast-exit {
    animation: toast-out-right 0.3s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.toast.toast-success {
    border-left: 3px solid var(--c-accent);
}

.toast.toast-error {
    border-left: 3px solid #EF6C6C;
}

/* --- Bar chart transition improvement --- */

.bar {
    transition: height 0.5s cubic-bezier(0.16, 1, 0.3, 1),
                background 0.3s ease;
}

/* --- Stat card number transitions --- */

.stat-card .data-huge,
.stat-card .data-large {
    transition: color 0.3s ease;
}

/* --- Mobile toast overrides --- */

@media (max-width: 767px) {
    .toast-container {
        top: auto;
        bottom: 24px;
        right: 16px;
        left: 16px;
    }

    .toast {
        animation-name: toast-in-bottom;
    }

    .toast.toast-exit {
        animation-name: toast-out-bottom;
    }
}


/* ── Modal Component ───────────────────────────────── */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    z-index: 3000;
    display: none;
    align-items: center;
    justify-content: center;
    animation: modal-overlay-in 0.25s ease both;
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    background: var(--c-card);
    border-radius: var(--radius);
    padding: 32px;
    max-width: 480px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    animation: modal-content-in 0.35s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.modal-title {
    font-family: var(--font-ui);
    font-size: 20px;
    font-weight: 500;
    color: var(--c-text-primary);
}

.modal-close-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--c-text-secondary);
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 2px;
    transition: color 0.2s;
}

.modal-close-btn:hover {
    color: var(--c-text-primary);
}

.modal-close-btn:focus-visible {
    outline: 2px solid var(--c-accent);
    outline-offset: 2px;
}

.modal-body {
    margin-bottom: 24px;
}

.modal-body input[type="text"] {
    background: transparent;
    color: var(--c-text-primary);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.modal-btn {
    font-family: var(--font-data);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: opacity 0.2s, transform 0.15s;
    min-height: 44px;
}

.modal-btn:active {
    transform: scale(0.96);
}

.modal-btn:focus-visible {
    outline: 2px solid var(--c-accent);
    outline-offset: 2px;
}

.modal-btn-cancel {
    background: var(--c-habit-bg);
    color: var(--c-text-primary);
}

.modal-btn-cancel:hover {
    opacity: 0.8;
}

.modal-btn-confirm {
    background: var(--c-text-primary);
    color: var(--c-card);
}

.modal-btn-confirm:hover {
    opacity: 0.9;
}


/* ── Habit Actions (edit/delete) ──────────────────── */

.habit-actions {
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity 0.2s;
    margin-left: 8px;
}

.habit-item:hover .habit-actions,
.habit-item:focus-within .habit-actions {
    opacity: 1;
}

.habit-action-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--c-text-secondary);
    padding: 6px;
    border-radius: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s, background 0.2s;
    min-width: 30px;
    min-height: 30px;
}

.habit-action-btn:hover {
    color: var(--c-text-primary);
    background: var(--c-habit-hover);
}

.habit-action-btn-delete:hover {
    color: #ff4444;
}

.habit-action-btn:focus-visible {
    outline: 2px solid var(--c-accent);
    outline-offset: 1px;
}

@media (max-width: 767px) {
    .habit-actions {
        opacity: 1;
    }
}


/* ── Search & Filter Controls ─────────────────────── */

.habit-controls {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    align-items: center;
}

.habit-search-wrap {
    flex: 1;
    display: flex;
    align-items: center;
    position: relative;
}

.habit-search-icon {
    position: absolute;
    left: 8px;
    color: var(--c-text-secondary);
    display: flex;
    align-items: center;
    pointer-events: none;
}

.habit-search-input {
    width: 100%;
    padding-left: 30px !important;
    font-size: 13px !important;
    border-bottom: 1px solid var(--c-input-border) !important;
    background: transparent;
    color: var(--c-text-primary);
}

.habit-filter-select {
    font-family: var(--font-data);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 6px 8px;
    border: 1px solid var(--c-input-border);
    background: var(--c-card);
    color: var(--c-text-primary);
    border-radius: var(--radius);
    cursor: pointer;
    min-height: 32px;
    outline: none;
}

.habit-filter-select:focus-visible {
    outline: 2px solid var(--c-accent);
    outline-offset: 1px;
}

.habit-list-items {
    display: flex;
    flex-direction: column;
    gap: 12px;
}


/* ── Theme Toggle Button ──────────────────────────── */

.theme-toggle-btn {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--c-input-border);
    background: var(--c-card);
    color: var(--c-text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    z-index: 2500;
    transition: transform 0.2s, box-shadow 0.2s;
}

.theme-toggle-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

.theme-toggle-btn:active {
    transform: scale(0.95);
}

.theme-toggle-btn:focus-visible {
    outline: 2px solid var(--c-accent);
    outline-offset: 2px;
}

@media (max-width: 767px) {
    .theme-toggle-btn {
        bottom: 80px;
        right: 16px;
    }
}


/* ── Dark Mode Specific Overrides ─────────────────── */

[data-theme="dark"] .btn-add {
    background: var(--c-accent);
    color: #0D0D0D;
}

[data-theme="dark"] input[type="text"] {
    color: var(--c-text-primary);
}

[data-theme="dark"] .toast {
    background: rgba(40, 40, 40, 0.95);
}


/* ── Prefers Reduced Motion ─────────────────────────── */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .habit-item,
    .panel,
    .col-today {
        animation: none;
        opacity: 1;
        transform: none;
    }

    .toast {
        animation: none;
        opacity: 1;
        transform: none;
    }

    .toast.toast-exit {
        animation: none;
        opacity: 0;
    }

    .modal-overlay {
        animation: none;
        opacity: 1;
    }

    .modal-content {
        animation: none;
        opacity: 1;
        transform: none;
    }

    .skeleton {
        animation: none;
        background: var(--c-skeleton-from);
    }
}


/* ── Accessibility: Skip Link ─────────────────────────── */

.skip-link {
    position: absolute;
    top: -100%;
    left: 16px;
    background: var(--c-text-primary);
    color: var(--c-card);
    padding: 12px 24px;
    z-index: 10000;
    font-family: var(--font-data);
    font-size: 14px;
    text-decoration: none;
    border-radius: var(--radius);
    transition: top 0.2s;
}
.skip-link:focus {
    top: 16px;
}


/* ── Accessibility: Skeleton Loading Components ────────── */

.skeleton-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.skeleton-item {
    display: flex;
    align-items: center;
    padding: 16px;
    background: var(--c-habit-bg);
    border-radius: var(--radius);
}

.skeleton-checkbox {
    width: 20px;
    height: 20px;
    margin-right: 16px;
    flex-shrink: 0;
}

.skeleton-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.skeleton-text {
    height: 14px;
}

.skeleton-text-sm {
    height: 10px;
}


/* ── Accessibility: Toast Structural Styles ────────────── */

.toast-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.toast-message {
    flex: 1;
    line-height: 1.4;
}

.toast-close {
    flex-shrink: 0;
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: rgba(255, 255, 255, 0.6);
    padding: 0 4px;
    line-height: 1;
    font-family: var(--font-ui);
    transition: color 0.2s;
}
.toast-close:hover {
    color: white;
}

.toast-close:focus-visible {
    outline: 2px solid var(--c-accent);
    outline-offset: 2px;
}

.toast.toast-warning {
    border-left: 3px solid #F59E0B;
}

.toast.toast-info {
    border-left: 3px solid #3B82F6;
}


/* ── Accessibility: Color Option Button Reset ──────────── */

button.color-opt {
    padding: 0;
    font-size: 0;
}

button.color-opt:focus-visible {
    outline: 2px solid var(--c-accent);
    outline-offset: 3px;
}


/* ── Accessibility: Fieldset Reset ─────────────────────── */

fieldset.input-group {
    margin-bottom: 20px;
}

fieldset.input-group legend.label-micro {
    float: left;
    width: 100%;
}


/* ── Accessibility: High Contrast Mode ─────────────────── */

@media (forced-colors: active) {
    .habit-item {
        border: 1px solid ButtonText;
    }
    .habit-item.completed {
        border: 2px solid Highlight;
    }
    .checkbox {
        border: 2px solid ButtonText;
    }
    .habit-item.completed .checkbox {
        background: Highlight;
        border-color: Highlight;
    }
    .btn-add {
        border: 1px solid ButtonText;
    }
    .color-opt {
        border: 2px solid ButtonText;
    }
    .color-opt.active {
        border-color: Highlight;
    }
    .day-cell {
        border: 1px solid CanvasText;
    }
    .toast {
        border: 1px solid CanvasText;
    }
    .modal-content {
        border: 1px solid CanvasText;
    }
    .skip-link {
        border: 1px solid LinkText;
    }
}