/* ============================================================
   COMPONENTS.CSS - Buttons, Cards, Forms, Modals
   ============================================================ */

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--khoang-cach-xs);
    padding: var(--khoang-cach-sm) var(--khoang-cach-lg);
    font-size: var(--font-size-base);
    font-weight: 500;
    line-height: 1.5;
    border-radius: var(--bo-goc-md);
    transition: all var(--chuyen-canh-nhanh);
    cursor: pointer;
    border: none;
    text-decoration: none;
    min-height: 48px; /* Touch target */
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--bong-md);
}

.btn:active {
    transform: translateY(0) scale(0.98);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn--primary {
    background-color: var(--mau-chinh);
    color: white;
}

.btn--primary:hover {
    background-color: #0557d0;
}

.btn--secondary {
    background-color: var(--mau-nen-xam);
    color: var(--mau-chu-chinh);
}

.btn--secondary:hover {
    background-color: #e5e7eb;
}

.btn--outline {
    background-color: transparent;
    color: var(--mau-chinh);
    border: 2px solid var(--mau-chinh);
}

.btn--outline:hover {
    background-color: var(--mau-chinh);
    color: white;
}

.btn--success {
    background-color: var(--mau-thanh-cong);
    color: white;
}

.btn--success:hover {
    background-color: #0d9668;
}

.btn--danger {
    background-color: var(--mau-loi);
    color: white;
}

.btn--danger:hover {
    background-color: #dc2626;
}

.btn--warning {
    background-color: var(--mau-canh-bao);
    color: white;
}

.btn--sm {
    padding: var(--khoang-cach-xs) var(--khoang-cach-md);
    font-size: var(--font-size-sm);
    min-height: 36px;
}

.btn--lg {
    padding: var(--khoang-cach-md) var(--khoang-cach-xl);
    font-size: var(--font-size-lg);
    min-height: 56px;
}

.btn--block {
    width: 100%;
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--bo-goc-md);
    background: transparent;
    color: var(--mau-chu-chinh);
    transition: all var(--chuyen-canh-nhanh);
    cursor: pointer;
    border: none;
    font-size: var(--font-size-lg);
}

.btn-icon:hover {
    background-color: var(--mau-nen-xam);
}

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

.btn-icon--primary {
    background-color: var(--mau-chinh);
    color: white;
}

.btn-icon--primary:hover {
    background-color: #0557d0;
}

/* ============================================================
   CARDS
   ============================================================ */

.card {
    background: white;
    border-radius: var(--bo-goc-lg);
    box-shadow: var(--bong-sm);
    overflow: hidden;
    transition: all var(--chuyen-canh-trung-binh);
}

.card:hover {
    box-shadow: var(--bong-lg);
    transform: translateY(-2px);
}

.card__image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background-color: var(--mau-nen-xam);
}

.card__body {
    padding: var(--khoang-cach-md);
}

.card__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--khoang-cach-sm);
    color: var(--mau-chu-chinh);
}

.card__text {
    font-size: var(--font-size-sm);
    color: var(--mau-chu-phu);
    line-height: 1.6;
    margin-bottom: var(--khoang-cach-md);
}

.card__footer {
    padding: var(--khoang-cach-md);
    border-top: 1px solid var(--mau-vien);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ============================================================
   FORMS
   ============================================================ */

.form-group {
    margin-bottom: var(--khoang-cach-lg);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--mau-chu-chinh);
    margin-bottom: var(--khoang-cach-sm);
}

.form-label--required::after {
    content: " *";
    color: var(--mau-loi);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--khoang-cach-md);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--mau-chu-chinh);
    background-color: white;
    border: 2px solid var(--mau-vien);
    border-radius: var(--bo-goc-md);
    transition: all var(--chuyen-canh-nhanh);
    min-height: 48px; /* Touch target */
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--mau-chinh);
    box-shadow: 0 0 0 3px rgba(7, 104, 240, 0.15);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--mau-chu-nhe);
}

.form-input--error,
.form-textarea--error,
.form-select--error {
    border-color: var(--mau-loi);
}

.form-input--error:focus,
.form-textarea--error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.form-error {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--mau-loi);
    margin-top: var(--khoang-cach-xs);
}

.form-hint {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--mau-chu-phu);
    margin-top: var(--khoang-cach-xs);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236b7280'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 20px;
    padding-right: 44px;
}

.input-search {
    width: 100%;
    padding: var(--khoang-cach-md);
    padding-left: 3rem;
    font-size: var(--font-size-base);
    border: 2px solid var(--mau-vien);
    border-radius: var(--bo-goc-full);
    transition: all var(--chuyen-canh-nhanh);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236b7280'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: 1rem center;
    background-size: 1.25rem;
    min-height: 48px;
}

.input-search:focus {
    outline: none;
    border-color: var(--mau-chinh);
    box-shadow: 0 0 0 3px rgba(7, 104, 240, 0.15);
}

/* Password input with toggle */
.input-password-wrapper {
    position: relative;
}

.input-password-wrapper .form-input {
    padding-right: 48px;
}

.input-password-toggle {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--mau-chu-phu);
    cursor: pointer;
    border-radius: var(--bo-goc-md);
}

.input-password-toggle:hover {
    background-color: var(--mau-nen-xam);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: flex-start;
    gap: var(--khoang-cach-sm);
    cursor: pointer;
    min-height: 44px;
    padding: var(--khoang-cach-xs) 0;
}

.form-check__input {
    width: 20px;
    height: 20px;
    margin-top: 2px;
    accent-color: var(--mau-chinh);
    cursor: pointer;
}

.form-check__label {
    font-size: var(--font-size-base);
    color: var(--mau-chu-chinh);
    cursor: pointer;
}

/* ============================================================
   MODAL
   ============================================================ */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-modal);
    display: none;
    /* Safe area */
    padding: var(--safe-area-top) var(--safe-area-right) var(--safe-area-bottom) var(--safe-area-left);
}

.modal--active {
    display: flex;
    align-items: flex-end; /* Mobile: modal từ dưới lên */
    justify-content: center;
}

@media (min-width: 768px) {
    .modal--active {
        align-items: center; /* Desktop: modal ở giữa */
    }
}

.modal__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal-backdrop);
    animation: fadeIn var(--chuyen-canh-nhanh);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal__content {
    position: relative;
    background: white;
    border-radius: var(--bo-goc-lg) var(--bo-goc-lg) 0 0;
    box-shadow: var(--bong-xl);
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    z-index: var(--z-modal);
    padding: var(--khoang-cach-lg);
    padding-bottom: calc(var(--khoang-cach-lg) + var(--safe-area-bottom));
    animation: slideUp var(--chuyen-canh-trung-binh) cubic-bezier(0.4, 0, 0.2, 1);
    -webkit-overflow-scrolling: touch;
}

@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(100%); 
    }
    to { 
        opacity: 1;
        transform: translateY(0); 
    }
}

@media (min-width: 768px) {
    .modal__content {
        max-width: 500px;
        border-radius: var(--bo-goc-lg);
        padding: var(--khoang-cach-xl);
        animation: scaleIn var(--chuyen-canh-trung-binh) cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    @keyframes scaleIn {
        from { 
            opacity: 0;
            transform: scale(0.95); 
        }
        to { 
            opacity: 1;
            transform: scale(1); 
        }
    }
}

@media (min-width: 1024px) {
    .modal__content {
        max-width: 600px;
    }
}

/* Modal handle cho mobile */
.modal__handle {
    width: 40px;
    height: 5px;
    background-color: var(--mau-vien);
    border-radius: var(--bo-goc-full);
    margin: 0 auto var(--khoang-cach-md);
}

@media (min-width: 768px) {
    .modal__handle {
        display: none;
    }
}

.modal__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--khoang-cach-lg);
    gap: var(--khoang-cach-md);
}

.modal__title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--mau-chu-chinh);
    margin: 0;
    flex: 1;
}

.modal__close {
    width: 44px;
    height: 44px;
    border-radius: var(--bo-goc-md);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--chuyen-canh-nhanh);
    color: var(--mau-chu-phu);
    flex-shrink: 0;
}

.modal__close:hover {
    background-color: var(--mau-nen-xam);
    color: var(--mau-chu-chinh);
}

.modal__body {
    margin-bottom: var(--khoang-cach-lg);
}

.modal__footer {
    display: flex;
    gap: var(--khoang-cach-sm);
    flex-direction: column;
}

@media (min-width: 768px) {
    .modal__footer {
        flex-direction: row;
        justify-content: flex-end;
    }
    
    .modal__footer .btn {
        min-width: 100px;
    }
}

/* Fullscreen modal cho mobile */
.modal--fullscreen .modal__content {
    max-height: 100vh;
    height: 100%;
    border-radius: 0;
}

@media (min-width: 768px) {
    .modal--fullscreen .modal__content {
        max-height: 90vh;
        height: auto;
        border-radius: var(--bo-goc-lg);
    }
}

/* ============================================================
   BADGE
   ============================================================ */

.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--khoang-cach-xs) var(--khoang-cach-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border-radius: var(--bo-goc-full);
}

.badge--primary {
    background-color: rgba(7, 104, 240, 0.1);
    color: var(--mau-chinh);
}

.badge--success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--mau-thanh-cong);
}

.badge--warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--mau-canh-bao);
}

.badge--danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--mau-loi);
}

/* ============================================================
   LOADING SPINNER
   ============================================================ */

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--mau-nen-xam);
    border-top-color: var(--mau-chinh);
    border-radius: 50%;
    animation: xoay 0.8s linear infinite;
}

@keyframes xoay {
    to {
        transform: rotate(360deg);
    }
}

/* ============================================================
   TOAST NOTIFICATION
   ============================================================ */

.toast {
    position: fixed;
    top: 10%;
    right: var(--khoang-cach-lg);
    background: white;
    padding: var(--khoang-cach-md);
    border-radius: var(--bo-goc-lg);
    box-shadow: var(--bong-xl);
    z-index: var(--z-tooltip);
    display: flex;
    align-items: center;
    gap: var(--khoang-cach-sm);
    max-width: 400px;
    animation: truot-vao 0.3s ease-out;
}

@keyframes truot-vao {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast--success {
    border-left: 4px solid var(--mau-thanh-cong);
}

.toast--error {
    border-left: 4px solid var(--mau-loi);
}

.toast--warning {
    border-left: 4px solid var(--mau-canh-bao);
}

/* Modal footer column */
.modal__footer--column {
    display: flex;
    flex-direction: row;
    white-space: nowrap; 
    padding-top: 0;
    border-top: none;
    align-items: center;
    justify-content: center;
}

/* Button link */
.btn-link {
    background: none;
    border: none;
    margin: 0;
    color: var(--mau-chu-phu);
    font-size: var(--font-size-sm);
    cursor: pointer;
    padding: var(--khoang-cach-sm);
}

.btn-link span {
    color: var(--mau-chinh);
    font-weight: 600;
}

.btn-link:hover {
    color: var(--mau-chinh);
}

/* OTP input wrapper */
.input-otp-wrapper {
    display: flex;
    gap: var(--khoang-cach-sm);
}

.input-otp-wrapper .form-input {
    flex: 1;
}

.input-otp-wrapper .btn {
    flex-shrink: 0;
    white-space: nowrap;
}

/* Form hint */
.form-hint {
    font-size: var(--font-size-xs);
    color: var(--mau-chu-phu);
    margin-top: var(--khoang-cach-xs);
}
/* ============================================================
   MOBILE FONT SIZE ADJUSTMENTS
   ============================================================ */
@media (max-width: 767px) {
    /* Modal */
    .modal__title {
        font-size: var(--font-size-lg);
    }
    
    .modal__content {
        padding: var(--khoang-cach-md);
        padding-bottom: calc(var(--khoang-cach-md) + var(--safe-area-bottom));
    }
    
    .modal__header {
        margin-bottom: var(--khoang-cach-md);
    }
    
    .modal__body {
        margin-bottom: var(--khoang-cach-md);
    }
    
    /* Form */
    .form-group {
        margin-bottom: var(--khoang-cach-md);
    }
    
    .form-label {
        font-size: var(--font-size-xs);
        margin-bottom: var(--khoang-cach-xs);
    }
    
    .form-input,
    .form-textarea,
    .form-select {
        font-size: var(--font-size-sm);
        padding: var(--khoang-cach-sm) var(--khoang-cach-md);
        min-height: 44px;
    }
    
    .form-error,
    .form-hint {
        font-size: var(--font-size-xs);
    }
    
    /* Buttons */
    .btn {
        font-size: var(--font-size-sm);
        padding: var(--khoang-cach-sm) var(--khoang-cach-md);
        min-height: 44px;
    }
    
    /* Input OTP */
    .input-otp-wrapper {
        gap: var(--khoang-cach-xs);
    }
    
    .input-otp-wrapper .btn {
        padding: var(--khoang-cach-sm);
        font-size: var(--font-size-xs);
    }
}