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

:root {
    /* Mode clair */
    --bg-color: #f5f5f5;
    --text-color: #222;
    --card-bg: #fff;
    --card-shadow: 0 2px 8px rgba(0,0,0,0.1);
    --accent-today: #4CAF50;
    --accent-tomorrow: #2196F3;
    --message-bg: #fff3cd;
    --message-border: #ffc107;
}

body.dark-mode {
    /* Mode sombre */
    --bg-color: #1a1a2e;
    --text-color: #eee;
    --card-bg: #252542;
    --card-shadow: 0 2px 8px rgba(0,0,0,0.3);
    --accent-today: #66bb6a;
    --accent-tomorrow: #42a5f5;
    --message-bg: #3d3d00;
    --message-border: #ffc107;
}

html, body {
    height: 100%;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.5s, color 0.5s;
}

#app {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 20px;
    gap: 20px;
}

/* ========== HEADER (Heure/Date) ========== */
#header {
    text-align: center;
    padding: 30px 20px;
    background: var(--card-bg);
    border-radius: 20px;
    box-shadow: var(--card-shadow);
}

#time {
    font-size: 5rem;
    font-weight: 700;
    letter-spacing: 2px;
}

#moment {
    font-size: 2rem;
    margin-top: 10px;
    opacity: 0.8;
}

#date {
    font-size: 1.8rem;
    margin-top: 15px;
    text-transform: capitalize;
}

/* ========== MESSAGES ========== */
#messages-section {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.message-card {
    background: var(--message-bg);
    border-left: 5px solid var(--message-border);
    border-radius: 10px;
    padding: 15px 20px;
    animation: slideIn 0.3s ease-out;
    display: flex;
    align-items: center;
    gap: 15px;
}

.message-body {
    flex: 1;
}

.message-content {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.message-meta {
    font-size: 1rem;
    opacity: 0.7;
}

.delete-btn {
    background: #e74c3c;
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.8rem;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, transform 0.2s;
    flex-shrink: 0;
}

.delete-btn:hover {
    background: #c0392b;
    transform: scale(1.1);
}

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

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========== ÉVÉNEMENTS ========== */
#events-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 15px;
    overflow-y: auto;
}

.day-block {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 20px;
    box-shadow: var(--card-shadow);
}

.day-block h2 {
    font-size: 1.6rem;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid;
}

#today-block h2 {
    border-color: var(--accent-today);
    color: var(--accent-today);
}

#tomorrow-block h2 {
    border-color: var(--accent-tomorrow);
    color: var(--accent-tomorrow);
}

.day-block ul {
    list-style: none;
}

.day-block li {
    font-size: 1.4rem;
    padding: 12px 0;
    border-bottom: 1px solid rgba(128,128,128,0.2);
    display: flex;
    align-items: center;
    gap: 15px;
}

.day-block li:last-child {
    border-bottom: none;
}

.event-time {
    font-weight: 700;
    min-width: 80px;
}

#today-block .event-time {
    color: var(--accent-today);
}

#tomorrow-block .event-time {
    color: var(--accent-tomorrow);
}

.event-title {
    flex: 1;
}

.no-events {
    font-size: 1.3rem;
    opacity: 0.6;
    font-style: italic;
}

/* Événements passés */
.day-block li.past {
    opacity: 0.4;
    text-decoration: line-through;
}

.day-block li.past .event-time {
    color: inherit;
}

/* ========== REFRESH BUTTON ========== */
#refresh-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--card-bg);
    border: 1px solid rgba(128,128,128,0.3);
    box-shadow: var(--card-shadow);
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.2s, transform 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

#refresh-btn:hover:not(:disabled) {
    opacity: 1;
    transform: scale(1.1);
}

#refresh-btn:disabled {
    cursor: not-allowed;
    opacity: 0.3;
    font-size: 0.9rem;
}

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(128,128,128,0.4);
    border-radius: 4px;
}