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

:root {
    --cor-primaria: #4B0082;
    --cor-primaria-clara: #6a0dad;
    --cor-fundo: #f4f0f8;
    --cor-texto: #2d003d;
    --cor-borda: #a674c2;
    --cor-input: #e8dff1;
    --cor-icone: #4B0082;
    --cor-fundo-escuro: #2d003d;
    --cor-texto-escuro: #f4f0f8;
    --cor-input-escuro: #4B0082;
    --cor-borda-escura: #6a0dad;
}

body {
    background: var(--cor-fundo);
    color: var(--cor-texto);
    line-height: 1.5;
    padding: 20px;
    transition: background 0.3s ease, color 0.3s ease;
}

body.dark-mode {
    background: var(--cor-fundo-escuro);
    color: var(--cor-texto-escuro);
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(75, 0, 130, 0.1);
    padding: 20px 40px 40px;
    transition: background 0.3s ease;
}

body.dark-mode .container {
    background: #3c0061;
}

header {
    text-align: center;
    margin-bottom: 30px;
    position: relative;
}

header h1 {
    font-weight: 700;
    color: var(--cor-primaria);
    font-size: 2.4rem;
    letter-spacing: 1.2px;
}

body.dark-mode header h1 {
    color: var(--cor-texto-escuro);
}

.theme-toggle {
    position: absolute;
    top: 10px;
    right: 10px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--cor-primaria);
    transition: color 0.3s ease;
}

body.dark-mode .theme-toggle {
    color: var(--cor-texto-escuro);
}

.theme-toggle .sun-icon {
    display: inline;
}

.theme-toggle .moon-icon {
    display: none;
}

body.dark-mode .theme-toggle .sun-icon {
    display: none;
}

body.dark-mode .theme-toggle .moon-icon {
    display: inline;
}

.ad-banner-top,
.ad-banner-side {
    background: linear-gradient(135deg, var(--cor-input), #f0e6f6);
    border: 2px dashed var(--cor-borda);
    color: var(--cor-primaria);
    font-style: italic;
    font-size: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 8px;
}

body.dark-mode .ad-banner-top,
body.dark-mode .ad-banner-side {
    background: linear-gradient(135deg, var(--cor-input-escuro), #3c0061);
    border: 2px dashed var(--cor-borda-escura);
    color: var(--cor-texto-escuro);
}

.ad-banner-top {
    width: 100%;
    height: 90px;
    margin-bottom: 25px;
}

.ad-banner-side {
    width: 200px;
    height: 600px;
    position: sticky;
    top: 20px;
}

.content-wrapper {
    display: flex;
    gap: 25px;
    flex-wrap: wrap;
}

.main-content {
    flex: 1;
}

form {
    background: #fff;
    padding: 20px 25px;
    border-radius: 6px;
    border: 1px solid var(--cor-borda);
    transition: background 0.3s ease, border 0.3s ease;
}

body.dark-mode form {
    background: #3c0061;
    border: 1px solid var(--cor-borda-escura);
}

.materia {
    border-bottom: 1px solid var(--cor-borda);
    padding-bottom: 18px;
    margin-bottom: 18px;
    transition: all 0.3s ease;
}

body.dark-mode .materia {
    border-bottom: 1px solid var(--cor-borda-escura);
}

.materia:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.materia h2 {
    font-size: 1.3rem;
    color: var(--cor-primaria-clara);
    margin-bottom: 12px;
    font-weight: 600;
}

body.dark-mode .materia h2 {
    color: var(--cor-texto-escuro);
}

.materia-nome-container {
    position: relative;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--cor-input), #f0e6f6);
    border: 1px solid var(--cor-borda);
    border-radius: 6px;
    padding: 5px;
    margin-bottom: 20px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

body.dark-mode .materia-nome-container {
    background: linear-gradient(135deg, var(--cor-input-escuro), #3c0061);
    border: 1px solid var(--cor-borda-escura);
}

.materia-nome-container:hover {
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(75, 0, 130, 0.2);
}

body.dark-mode .materia-nome-container:hover {
    box-shadow: 0 2px 8px rgba(244, 240, 248, 0.2);
}

.materia-nome-container::before {
    content: "📚";
    font-size: 1.2rem;
    margin-right: 8px;
    color: var(--cor-icone);
}

body.dark-mode .materia-nome-container::before {
    color: var(--cor-texto-escuro);
}

.materia-nome-container input {
    border: none;
    background: transparent;
    width: 100%;
    padding: 8px;
    font-size: 1rem;
    color: var(--cor-texto);
}

body.dark-mode .materia-nome-container input {
    color: var(--cor-texto-escuro);
}

.materia-nome-container input:focus {
    outline: none;
}

.notas {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 12px;
}

.notas input {
    width: 60px;
    padding: 6px 8px;
    font-size: 1rem;
    text-align: center;
    border: 1px solid var(--cor-borda);
    border-radius: 4px;
    background: linear-gradient(135deg, var(--cor-input), #f0e6f6);
    color: var(--cor-texto);
    -webkit-appearance: none;
    -moz-appearance: textfield;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

body.dark-mode .notas input {
    border: 1px solid var(--cor-borda-escura);
    background: linear-gradient(135deg, var(--cor-input-escuro), #3c0061);
    color: var(--cor-texto-escuro);
}

.notas input:hover {
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(75, 0, 130, 0.2);
}

body.dark-mode .notas input:hover {
    box-shadow: 0 2px 8px rgba(244, 240, 248, 0.2);
}

input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

button {
    background: var(--cor-primaria);
    color: white;
    border: none;
    padding: 10px 16px;
    border-radius: 4px;
    margin-right: 10px;
    cursor: pointer;
    transition: background 0.3s ease;
}

body.dark-mode button {
    background: var(--cor-primaria-clara);
}

button:hover {
    background: var(--cor-primaria-clara);
}

body.dark-mode button:hover {
    background: var(--cor-primaria);
}

.media {
    font-weight: bold;
    background: var(--cor-input);
}

body.dark-mode .media {
    background: var(--cor-input-escuro);
    color: var(--cor-texto-escuro);
}

footer {
    text-align: center;
    margin-top: 40px;
    color: var(--cor-primaria-clara);
}

body.dark-mode footer {
    color: var(--cor-texto-escuro);
}

img {
    float: left;
    margin-right: 10px;
}

#popupAd {
    display: none;
    position: fixed;
    bottom: 20px;
    left: 20px;
    right: 20px;
    background: linear-gradient(135deg, #f0e6f6, var(--cor-input));
    border: 2px solid var(--cor-borda);
    padding: 15px;
    color: var(--cor-primaria);
    border-radius: 10px;
    font-style: italic;
    font-size: 1rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    z-index: 1000;
}

body.dark-mode #popupAd {
    background: linear-gradient(135deg, #3c0061, var(--cor-input-escuro));
    border: 2px solid var(--cor-borda-escura);
    color: var(--cor-texto-escuro);
}

#popupAd .fechar {
    position: absolute;
    top: 5px;
    right: 10px;
    font-size: 20px;
    color: var(--cor-primaria);
    cursor: pointer;
}

body.dark-mode #popupAd .fechar {
    color: var(--cor-texto-escuro);
}

.feedback {
    color: var(--cor-primaria);
    font-size: 0.9rem;
    margin-top: 10px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

body.dark-mode .feedback {
    color: var(--cor-texto-escuro);
}

.feedback.visible {
    opacity: 1;
}

@media (max-width: 768px) {
    .ad-banner-side {
        display: none;
    }

    #popupAd {
        display: block;
    }

    .content-wrapper {
        flex-direction: column;
    }

    header h1 {
        font-size: 1.6rem;
    }

    form {
        padding: 15px;
    }

    .notas {
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
    }

    .notas input {
        width: 48%;
        min-width: 100px;
    }
}