:root {
    --primary-color: #4a90e2;
    --secondary-color: #f5f6fa;
    --text-color: #2c3e50;
    --border-color: #e1e1e1;
    --hover-color: #357abd;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f0f2f5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding-top: 60px;
}

.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    z-index: 1000;
}

.logo {
    font-size: 1.5em;
    font-weight: bold;
    color: var(--primary-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.auth-buttons {
    display: flex;
    gap: 10px;
}

.auth-btn {
    padding: 8px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.auth-btn:not(.register) {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.auth-btn:not(.register):hover {
    background: var(--primary-color);
    color: white;
}

.auth-btn.register {
    background: var(--primary-color);
    border: none;
    color: white;
}

.auth-btn.register:hover {
    background: var(--hover-color);
}

.container {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 20px auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    padding: 20px;

}
#cont{
    display: flex;
    justify-content: center;
    align-items: center;
}

.agenda {
    height: 100%;
    padding: 20px;
}

.agenda-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.agenda-header button {
    background: var(--primary-color);
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 18px;
    transition: background-color 0.3s;
}

.agenda-header button:hover {
    background: var(--hover-color);
}

.weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    font-weight: bold;
    color: var(--text-color);
    margin-bottom: 10px;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 10px;
    height: calc(100% - 10px);
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    font-size: 1.2em;

}

.calendar-day:hover {
    background: var(--secondary-color);
}

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

.calendar-day.today {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    font-weight: bold;
}

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

/* Modal styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1001;
}

.modal-content {
    background: white;
    margin: 15% auto;
    padding: 20px;
    width: 90%;
    max-width: 500px;
    border-radius: 10px;
    position: relative;
}

.close {
    position: absolute;
    right: 20px;
    top: 10px;
    font-size: 28px;
    cursor: pointer;
    color: #aaa;
}

.close:hover {
    color: #000;
}

.modal form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
}

.modal input {
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
}

.modal button {
    padding: 10px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-weight: 500;
}

.modal button:hover {
    background: var(--hover-color);
}

@media (max-width: 768px) {
    .main-header {
        padding: 0 10px;
        height: auto;
        min-height: 60px;
        flex-wrap: wrap;
        padding: 10px;
    }

    .logo {
        font-size: 1.2em;
        margin-right: 10px;
        flex: 1;
        min-width: 120px;
    }

    .auth-buttons {
        gap: 5px;
    }

    .auth-btn {
        padding: 6px 12px;
        font-size: 0.9em;
    }

    body {
        padding-top: 80px;
    }

    .container {
        margin: 10px;
        padding: 10px;
    }

    .weekdays, .calendar-grid {
        font-size: 0.9em;
        gap: 5px;
    }

    .agenda {
        padding: 10px;
    }

    .agenda-header h1 {
        font-size: 1.2em;
    }

    .calendar-day {
        font-size: 1em;
    }
}

@media (max-width: 360px) {
    .main-header {
        padding: 8px;
    }

    .logo {
        font-size: 1.1em;
        width: 100%;
        margin-bottom: 8px;
        text-align: center;
    }

    .auth-buttons {
        width: 100%;
        justify-content: center;
    }

    .auth-btn {
        flex: 1;
        text-align: center;
        padding: 6px 8px;
        font-size: 0.85em;
    }

    body {
        padding-top: 100px;
    }
}