/* ================= GLOBAL RESET ================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #4F7CAC;
    --secondary: #E3EAF2;
    --soft-green: #E6F0ED;
    --accent: #2FA4A9;
    --danger: #E5533D;

    --light-bg: #F4F6F9;
    --card-bg: #FFFFFF;

    --text-dark: #1F2933;
    --text-light: #F1F5F9;

    --shadow-soft: 0 10px 28px rgba(0, 0, 0, 0.07);
    --shadow-hover: 0 18px 45px rgba(0, 0, 0, 0.12);

    --radius-xl: 32px;
}

/* ================= BODY ================= */
body {
    font-family: 'Segoe UI', Roboto, sans-serif;
    background: var(--light-bg);
    min-height: 100vh;
    padding: 40px 20px;
    line-height: 1.6;
    color: var(--text-dark);
}

/* ================= CONTAINER ================= */
.container {
    max-width: 820px;
    margin: auto;
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

/* ================= HEADER ================= */
.main-header {
    background: linear-gradient(135deg, #F28F79, #f7a28d);
    padding: 35px 25px;
    text-align: center;
    border-radius: var(--radius-xl);
    margin: 12px;
    box-shadow: var(--shadow-soft);
}

.main-header h1 {
    color: white;
    font-family: 'Great Vibes', cursive;
    font-size: 52px;
    font-weight: 400;
    letter-spacing: 1px;
    text-shadow: 0 3px 6px rgba(0,0,0,0.25);
}

/* ================= DATE & TIME ================= */
.datetime-section {
    background: var(--secondary);
    padding: 30px 25px;
    border-radius: var(--radius-xl);
    margin: 12px;
    box-shadow: var(--shadow-soft);
}

.calendar-watch-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* ================= WATCH ================= */
.watch-container {
    display: flex;
    justify-content: center;
    align-items: center;
}

.watch-face {
    text-align: center;
}

.watch-time {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.4em;
    letter-spacing: 2px;
    text-shadow: 0 3px 6px rgba(0,0,0,0.25);
}

.watch-date {
    font-size: 0.95em;
    opacity: 0.8;
}

/* ================= CALENDAR ================= */
.calendar-container {
    background: var(--soft-green);
    padding: 18px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-soft);
}

.calendar-month {
    font-weight: 600;
}

.calendar-day {
    border-radius: 10px;
    transition: 0.25s ease;
}

.calendar-day:hover {
    background: rgba(39,174,96,0.15);
}

.calendar-day.today {
    background: var(--primary);
    color: white;
}

.calendar-day.selected {
    background: var(--accent);
    color: white;
}

/* ================= TODO ITEMS ================= */
.todo-item {
    background: linear-gradient(135deg, #F28F79, #f7a28d);
    margin: 10px 12px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-soft);
}

.todo-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.todo-text {
    color: white;
    font-weight: 600;
}

/* ================= BUTTONS ================= */
.add-btn,
.calendar-nav,
.delete-btn {
    box-shadow: var(--shadow-soft);
}

.add-btn:hover,
.calendar-nav:hover,
.delete-btn:hover {
    box-shadow: var(--shadow-hover);
}

/* ================= INFO BOXES ================= */
.focus-box,
.remember-box {
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-soft);
}

/* ================= FOOTER ================= */
.owner-footer {
    background: linear-gradient(135deg, #F28F79, #f7a28d);
    padding: 35px 25px;
    text-align: center;
    border-radius: var(--radius-xl);
    margin: 12px;
    box-shadow: var(--shadow-soft);
}

/* ================= DARK MODE ================= */
body.dark-mode {
    background: #0F172A;
    color: #E5E7EB;
}

body.dark-mode .container {
    background: #111827;
}

body.dark-mode .main-header,
body.dark-mode .owner-footer {
    background: linear-gradient(135deg, #4F7CAC, #3B5F8A);
}

body.dark-mode .calendar-container {
    background: #2f3e46;
}

body.dark-mode .datetime-section {
    background: #33415c;
}

body.dark-mode .todo-item {
    background: linear-gradient(135deg, #ff8f70, #ffb199);
}

body.dark-mode input,
body.dark-mode textarea {
    background: #1f2933;
    color: white;
    border-color: #3b4a5a;
}

/* ================= RESPONSIVE ================= */
@media (max-width: 768px) {
    .calendar-watch-container {
        grid-template-columns: 1fr;
    }

    .watch-time {
        font-size: 1.9em;
    }
}