/* ===== ROOT & THEME ===== */
:root {
    --text: #000;
    --bg: #eee;
    --bg2: #f4f4f4;
    --accent: #ff5555;
    --hover: #ffaaaa;
    --button: #fff;
    --border: #ccc;
    --card-shadow: 0 4px 12px rgba(0,0,0,0.2)
}

@media (prefers-color-scheme: dark) {
    :root {
        --text: #fff;
        --bg: #222;
        --bg2: #333;
        --button: #444;
        --border: #555;
        --card-shadow: 0 4px 16px rgba(0,0,0,0.4);
    }
}

* {
    box-sizing: border-box;
    font-family: "Courier New", Courier, monospace;
}


/* ===== BASE ELEMENTS ===== */
body {
    background: var(--bg);
    color: var(--text);
    margin: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover { color: var(--hover) }


/* ===== UTILITY CLASSES ===== */
.flex { display: flex; }
.flex.col { flex-direction: column; }

.flex-3 { flex: 3; }
.flex-1 { flex: 1; }

.w-100 { width: 100%; }

.hidden { display: none; }

.gap-4 { gap: 4px; }
.gap-10 { gap: 10px; }


/* ===== BUTTONS ===== */
button {
    background: var(--button);
    color: var(--text);
    cursor: pointer;

    padding: 10px;
    border-radius: 5px;
    border: none;
    box-shadow: 0 2px 3px rgba(0,0,0,0.2);

    font-family: inherit;
    font-size: 1rem;
}

.btn-danger {
    background: var(--accent);
    color: #fff;
}

.btn-pill { min-width: 40px }

.btn-pill.left { border-radius: 50px 10px 10px 50px }

.btn-pill.right { border-radius: 10px 50px 50px 10px }


/* ===== INPUTS & SELECTS ===== */
input,
select {
    padding: 10px;
    border-radius: 5px;
    border: none;
    background: var(--button);
    color: var(--text);
    font-family: inherit;
    font-size: 16px;
    width: 100%;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

/* Fixes narrow dropdown on iOS */
select {
    -webkit-appearance: none;
    appearance: none;

    padding-right: 36px;
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 16px;

    background-image: url("data:image/svg+xml;utf8,<svg fill='none' stroke='black' stroke-width='2' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'><polyline points='6 9 12 15 18 9'/></svg>");

    @media (prefers-color-scheme: dark) {
        background-image: url("data:image/svg+xml;utf8,<svg fill='none' stroke='white' stroke-width='2' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'><polyline points='6 9 12 15 18 9'/></svg>");
    }
}

input:focus,
select:focus {
    outline: 1px solid var(--text);
}


/* ===== HEADER ===== */
header {
    width: 100%;
    max-width: 1200px;
    padding: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h2 {
    margin: 2px;
    text-align: left;
    word-break: break-word;
}


/* ===== ACTION BAR ===== */
.actions {
    display: flex;
    gap: 6px;
    flex-wrap: nowrap;
    justify-content: center;
}


/* ===== CONTAINER ===== */
.container {
    width: 100%;
    max-width: 1200px;
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}


/* ===== LAYOUT ===== */
.layout {
    flex: 1;
    display: flex;
    gap: 20px;
    width: 100%;
    min-height: 0;
}


/* ===== PANELS ===== */
.panel {
    padding: 1px 12px;
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

#habitList { flex: 0 0 auto }


/* ===== HABIT CARDS ===== */
.habit-card {
    background: var(--bg2);
    border-radius: 10px;
    padding: 12px;
    margin-bottom: 12px;

    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;

    border-left: 10px solid transparent;
    box-shadow: var(--card-shadow);
}

.habit-info h3 {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 600;
    word-break: break-word;
}

.habit-meta {
    font-size: 0.8rem;
    opacity: 0.6;
    text-transform: capitalize;
}

.empty-state {
    padding: 16px;
    background: var(--bg2);
    border-radius: 10px;
    opacity: 0.7;
    font-size: 0.9rem;
}


/* ===== TOGGLE BUTTONS ===== */
.toggle-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}


/* ===== CALENDAR ===== */
.unified-calendar {
    background: var(--bg2);
    padding: 12px;
    margin-bottom: 8px;
    width: 100%;
    border-radius: 12px;
    box-shadow: var(--card-shadow);
}

.calendar-header {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
}

.calendar-controls {
    display: flex;
    flex-wrap: nowrap;
    gap: 4px;
    align-items: center;
    justify-content: center;
}

.calendar-label {
    flex: 1;
    text-align: right;
    font-weight: bold;
    font-size: 1.2rem;
    word-break: break-word;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    min-width: 100%;
}

.calendar-day {
    background: var(--button);
    border-radius: 4px;
    padding: 4px;
    min-height: 80px;

    font-size: 0.8rem;
    cursor: pointer;
    transition: background 0.1s ease;
}

.calendar-day:hover { background: var(--bg2) }

.calendar-day.header {
    font-weight: bold;
    background: transparent;
    cursor: default;
    min-height: 24px;
}

.calendar-day.selected { outline: 2px solid var(--text) }

.calendar-day.other-month {
    opacity: 0.3;
    pointer-events: none;
}

.habit-dots {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 4px;
    margin-top: 4px;
}

.habit-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    outline: 1px solid var(--text);
}

.day-detail-title {
    margin-bottom: 10px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 4px;
}


/* ===== MODALS ===== */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.8);

    justify-content: center;
    align-items: center;
    z-index: 100;

    text-align: left;
}

.modal-content {
    background: var(--bg);
    width: 100%;
    max-width: 320px;
    max-height: 90vh;
    margin: 8px;
    padding: 12px;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    min-height: 0;
    gap: 10px;
}

.modal-title {
    margin: 0;
    padding-bottom: 4px;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.modal-title.danger { color: var(--accent) }

.modal-content span { overflow-y: auto }

#habitColor {
    height: 40px;
    cursor: pointer;
}


/* ===== RESPONSIVE LAYOUT ===== */
/* Desktop: full month view */
@media (min-width: 900px) {
    .habits-panel { flex: 0 0 45%; }
    .calendar-panel { flex: 1 }
    .bottom-nav { display: none }
}

/* Mobile: stacked layout */
@media (max-width: 899px) {
    .layout { height: 100% }

    .panel { display: none }

    .panel.active {
        display: flex;
        flex-direction: column;
        height: 100%;
        padding-bottom: 90px;
    }

    .calendar-grid { min-width: unset }

    .calendar-day { min-height: 70px }

    .bottom-nav {
        position: fixed;
        bottom: calc(30px + env(safe-area-inset-bottom));
        width: 75%;
        max-width: 350px;
        height: 48px;

        background: var(--bg2);

        display: flex;
        padding: 6px;
        gap: 4px;
        border-radius: 999px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.4);
    }

    .bottom-nav button {
        flex: 1;
        border: none;
        background: none;
        font-size: 1rem;
        font-weight: bold;
        color: var(--text);
        box-shadow: none;
        border-radius: 999px;
        transition: background 0.1s ease;
    }

    .bottom-nav button.active {
        background: var(--button);
        box-shadow: 0 1px 3px rgba(0,0,0,0.3);
    }

}