/*page layout*/
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 24px 16px;
    background-color: #f2f4f7;
    color: #263238;
    font-family: Arial, sans-serif;
    line-height: 1.5;
}

.calendar-container {
    max-width: 1150px;
    margin: 0 auto;
    padding: 24px;
    background-color: white;
    border: 1px solid #e0e4ea;
    border-radius: 10px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
    overflow-x: auto;
}

h1 {
    margin: 0 0 24px;
    text-align: center;
    font-size: 1.8rem;
}

h2 {
    margin: 0 0 12px;
    font-size: 1.15rem;
}

.hidden {
    display: none !important;
}

/*buttons and inputs*/
button,
input,
select {
    font: inherit;
}

button {
    padding: 8px 12px;
    border: 1px solid #315a9e;
    border-radius: 5px;
    background-color: #315a9e;
    color: white;
    cursor: pointer;
}

button:hover {
    background-color: #24477f;
}

button:disabled {
    opacity: 0.6;
    cursor: wait;
}

input:not([type="checkbox"]),
select {
    width: 100%;
    min-width: 0;
    padding: 8px;
    border: 1px solid #c5cdd8;
    border-radius: 5px;
    background-color: white;
    color: #263238;
}

input[type="checkbox"] {
    margin: 0;
    accent-color: #315a9e;
    cursor: pointer;
}

button:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 2px solid #315a9e;
    outline-offset: 3px;
}

/*login area*/
#authSection {
    margin-bottom: 24px;
    padding: 16px;
    border: 1px solid #e0e4ea;
    border-radius: 8px;
    background-color: #f8f9fb;
    text-align: left;
}

#loggedOutView input {
    max-width: 220px;
    margin: 0 6px 8px 0;
}

#loggedOutView button {
    margin-bottom: 8px;
}

#loggedInView > p {
    margin: 0 0 16px;
}

#logoutBtn,
#cancelEditBtn {
    background-color: white;
    color: #315a9e;
}

#logoutBtn {
    margin-left: 8px;
}

#logoutBtn:hover,
#cancelEditBtn:hover {
    background-color: #eaf0f8;
}

#authMessage,
#eventMessage,
#upcomingMessage {
    margin: 8px 0 0;
    font-size: 0.9rem;
    overflow-wrap: anywhere;
}

/*event form*/
#eventForm {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 12px;
    align-items: end;
}

#eventForm > div {
    min-width: 0;
}

#eventForm h2,
#eventMessage {
    grid-column: 1 / -1;
}

#eventForm h2 {
    margin-bottom: 0;
}

#eventForm label {
    display: block;
    margin-bottom: 4px;
    font-size: 0.9rem;
}

#addEventBtn,
#cancelEditBtn {
    justify-self: start;
}

/*category filters*/
#categoryFilters {
    min-width: 0;
    margin: 20px 0 0;
    padding: 10px 12px;
    border: 1px solid #c5cdd8;
    border-radius: 5px;
}

#categoryFilters legend {
    padding: 0 5px;
    font-size: 0.9rem;
    font-weight: bold;
}

#categoryFilters label {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    margin: 4px 12px 4px 0;
    font-size: 0.9rem;
    cursor: pointer;
}

/*upcoming events*/
#upcomingSection {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid #e0e4ea;
}

#upcomingList {
    margin: 8px 0 0;
    padding-left: 20px;
}

#upcomingList li {
    margin-bottom: 8px;
    font-size: 0.9rem;
    overflow-wrap: anywhere;
}

/*month navigation*/
.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

#monthYear {
    margin: 0;
    text-align: center;
    font-size: 1.4rem;
}

/*calendar table*/
#calendar {
    width: 100%;
    min-width: 700px;
    border-collapse: collapse;
    table-layout: fixed;
}

#calendar th {
    padding: 10px 4px;
    border: 1px solid #dce2ea;
    background-color: #edf1f6;
    color: #435168;
    font-size: 0.85rem;
}

#calendar td {
    height: 125px;
    padding: 7px;
    border: 1px solid #dce2ea;
    vertical-align: top;
}

.day-number {
    margin-bottom: 6px;
    font-weight: bold;
    font-size: 0.9rem;
}

/*event cards*/
.calendar-event {
    margin-top: 6px;
    padding: 6px;
    border-left: 3px solid #64748b;
    border-radius: 4px;
    background-color: #edf0f3;
    color: #263238;
    font-size: 0.8rem;
    overflow-wrap: anywhere;
}

.calendar-event button {
    margin: 6px 4px 0 0;
    padding: 3px 6px;
    border: 1px solid #a6b0be;
    background-color: white;
    color: #263238;
    font-size: 0.75rem;
}

.calendar-event button:hover {
    background-color: #edf1f6;
}

/*completion status*/
.completion-control {
    display: flex;
    align-items: center;
    gap: 5px;
    margin-top: 6px;
    font-size: 0.75rem;
    cursor: pointer;
}

.event-completed {
    border-left-style: dashed;
    color: #4b5563;
}

/*category colors*/
.category-class {
    background-color: #e6efff;
    border-left-color: #2563eb;
}

.category-assignment {
    background-color: #fff3d6;
    border-left-color: #a16207;
}

.category-exam {
    background-color: #ffe5e5;
    border-left-color: #dc2626;
}

.category-meeting {
    background-color: #eee7ff;
    border-left-color: #7c3aed;
}

.category-social {
    background-color: #e0f5e8;
    border-left-color: #15803d;
}

.category-other {
    background-color: #edf0f3;
    border-left-color: #64748b;
}

/*smaller screens*/
@media (max-width: 800px) {
    .calendar-container {
        padding: 16px;
    }

    #eventForm {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 500px) {
    body {
        padding: 12px 8px;
    }

    #eventForm {
        grid-template-columns: 1fr;
    }

    #loggedOutView input {
        max-width: none;
        margin-right: 0;
    }

    #monthYear {
        font-size: 1.1rem;
    }

    .calendar-header button {
        padding: 7px 9px;
        font-size: 0.85rem;
    }
}