/* ============================
   IMPORTS
   ============================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ============================
   CSS VARIABLES
   ============================ */
:root {
    --green-primary:   #74d680;
    --green-dark:      #4cad5a;
    --green-darker:    #3a8a45;
    --green-light:     #c1f68a;
    --green-lighter:   #e8fde7;
    --green-glow:      rgba(116, 214, 128, 0.35);
    --bg-body:         #f4f7f4;
    --bg-card:         #ffffff;
    --bg-card-alt:     rgba(255, 255, 255, 0.75);
    --text-primary:    #1a2e1b;
    --text-secondary:  #4a6650;
    --text-muted:      #7a9480;
    --border-color:    rgba(74, 102, 80, 0.2);
    --shadow-sm:       0 2px 8px rgba(26,46,27,0.08);
    --shadow-md:       0 4px 24px rgba(26,46,27,0.12);
    --shadow-lg:       0 8px 40px rgba(26,46,27,0.16);
    --radius-sm:       8px;
    --radius-md:       14px;
    --radius-lg:       22px;
    --radius-pill:     999px;
    --transition:      0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================
   GLOBAL RESET & BASE
   ============================ */
*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a {
    text-decoration: none !important;
    color: var(--green-dark);
    transition: color var(--transition);
}

a:hover {
    color: var(--green-darker);
}

/* ============================
   HEADER
   ============================ */
.header {
    background: linear-gradient(135deg, var(--green-primary) 0%, var(--green-dark) 100%);
    box-shadow: var(--shadow-md);
    height: auto !important;
    min-height: 72px;
    overflow: visible;
    letter-spacing: 0.04em;
    font-weight: 700;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
}

.header .container {
    padding-top: 14px;
    padding-bottom: 14px;
}

.header h1 {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text-primary) !important;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin: 0;
    position: relative;
}

.header h1::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 40px;
    height: 2px;
    background: rgba(26,46,27,0.4);
    border-radius: 2px;
}

.header a {
    color: var(--text-primary) !important;
    font-size: 0.82rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    padding: 5px 12px;
    border-radius: var(--radius-pill);
    background: rgba(255,255,255,0.28);
    transition: background var(--transition), transform var(--transition);
    border: 1px solid rgba(255,255,255,0.4);
}

.header a:hover {
    background: rgba(255,255,255,0.5);
    transform: translateY(-1px);
}

/* ============================
   FLOATING ALERTS
   ============================ */
#Float-alert {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 1055;
    max-width: 360px;
}

#Float-alert .alert {
    border-radius: var(--radius-md);
    border: none;
    box-shadow: var(--shadow-md);
    animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
    from { transform: translateX(110%); opacity: 0; }
    to   { transform: translateX(0);    opacity: 1; }
}

/* ============================
   MAIN
   ============================ */
.main {
    position: relative;
    min-height: calc(100vh - 72px - 200px);
}

/* ============================
   TITLE
   ============================ */
.title {
    margin-top: 48px;
    color: var(--text-primary);
    font-weight: 800;
    font-size: 1.75rem;
    letter-spacing: -0.02em;
    text-align: center;
    position: relative;
    animation: fadeInUp 0.5s ease both;
}

.title::after {
    content: '';
    display: block;
    width: 48px;
    height: 3px;
    background: linear-gradient(90deg, var(--green-primary), var(--green-light));
    border-radius: 2px;
    margin: 8px auto 0;
}

/* ============================
   SUBTITLE / INSTRUCTION
   ============================ */
.text-muted {
    color: var(--text-muted) !important;
    font-size: 0.9rem;
    font-weight: 400;
    animation: fadeInUp 0.5s 0.1s ease both;
}

/* ============================
   FORM LABELS
   ============================ */
.input-label {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 4px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* ============================
   CONTAINER BODY (CALCULATOR CARD)
   ============================ */
.container-body {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    margin-left: auto;
    margin-right: auto;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    animation: fadeInUp 0.5s 0.15s ease both;
    transition: box-shadow var(--transition);
}

.container-body:focus-within {
    box-shadow: var(--shadow-lg);
}

/* ============================
   FORM CONTROLS
   ============================ */
.form-control {
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    color: var(--text-primary);
    background: var(--bg-body);
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.form-control:focus {
    border-color: var(--green-primary);
    box-shadow: 0 0 0 3px var(--green-glow);
    outline: none;
    background: #fff;
}

.form-control:disabled {
    background-color: var(--green-lighter);
    opacity: 0.7;
    cursor: not-allowed;
    color: var(--text-secondary);
}

.form-control::placeholder {
    color: var(--text-muted);
    opacity: 0.8;
}

/* ============================
   INPUT GROUP TEXT
   ============================ */
.input-group-text {
    border: 1.5px solid var(--border-color);
    background: var(--green-lighter);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.02em;
    transition: background var(--transition);
}

/* ============================
   BUTTONS
   ============================ */
.btn {
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.875rem;
    border-radius: var(--radius-pill);
    transition: all var(--transition);
    letter-spacing: 0.02em;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0);
    transition: background var(--transition);
    border-radius: inherit;
}

.btn:hover::after {
    background: rgba(255,255,255,0.15);
}

.btn:active {
    transform: scale(0.97);
}

/* Calcular — primary CTA */
.btn-calcular {
    background: linear-gradient(135deg, var(--green-primary) 0%, var(--green-dark) 100%);
    border: none;
    color: var(--text-primary);
    font-weight: 700;
    box-shadow: 0 2px 12px var(--green-glow);
    padding: 8px 22px;
}

.btn-calcular:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--green-dark) 0%, var(--green-darker) 100%);
    color: #fff;
    box-shadow: 0 4px 20px var(--green-glow);
    transform: translateY(-2px);
}

.btn-calcular:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
}

/* Outlined secondary buttons */
.btn-outline-secondary {
    border-color: var(--text-secondary);
    color: var(--text-secondary);
}
.btn-outline-secondary:hover {
    background: var(--text-secondary);
    color: #fff;
    transform: translateY(-1px);
}

.btn-outline-success {
    border-color: var(--green-dark);
    color: var(--green-dark);
}
.btn-outline-success:hover {
    background: var(--green-dark);
    color: #fff;
    transform: translateY(-1px);
}

.btn-outline-primary {
    border-color: var(--green-primary);
    color: var(--green-darker);
}
.btn-outline-primary:hover {
    background: var(--green-primary);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.btn-outline-info {
    border-color: #38bdf8;
    color: #0284c7;
}
.btn-outline-info:hover {
    background: #38bdf8;
    color: #fff;
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--text-secondary);
    border: none;
    color: #fff;
}
.btn-secondary:hover {
    background: var(--text-primary);
}

.btn-danger {
    background: #ef4444;
    border: none;
    color: #fff;
    box-shadow: 0 2px 8px rgba(239,68,68,0.25);
}
.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(239,68,68,0.35);
}

/* ============================
   DIVIDER
   ============================ */
hr {
    border: none;
    border-top: 1.5px solid var(--border-color);
    opacity: 1;
    margin: 32px 0;
}

/* ============================
   RESULTS SECTION
   ============================ */
#titulo-resultados {
    animation: fadeInUp 0.4s ease both;
}

.container-results {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin-top: 40px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    animation: fadeInUp 0.5s ease both;
}

/* ============================
   ACCORDION
   ============================ */
.accordion-item {
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md) !important;
    overflow: hidden;
    margin-bottom: 10px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition);
}

.accordion-item:hover {
    box-shadow: var(--shadow-md);
}

.accordion-button {
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    background: var(--green-lighter);
    border-radius: var(--radius-md) !important;
    transition: background var(--transition), color var(--transition);
    margin: 0;
    letter-spacing: 0.01em;
    padding: 16px 20px;
}

.accordion-button:not(.collapsed) {
    background: linear-gradient(135deg, var(--green-primary) 0%, var(--green-dark) 60%);
    color: var(--text-primary);
    box-shadow: none;
}

.accordion-button::after {
    filter: none;
    opacity: 0.7;
}

.accordion-button:focus {
    box-shadow: 0 0 0 3px var(--green-glow);
    outline: none;
}

.accordion-body {
    background: var(--bg-card);
    padding: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.accordion-body .h5 {
    color: var(--text-primary);
    font-weight: 700;
}

.accordion-body .blockquote {
    border-left: 3px solid var(--green-primary);
    padding-left: 12px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 8px 0;
}

/* Table in accordion */
.table-success {
    --bs-table-bg: var(--green-lighter);
    --bs-table-striped-bg: rgba(193, 246, 138, 0.3);
}

/* ============================
   GIF PLACEHOLDER
   ============================ */
.gif-placeholder {
    max-height: 180px;
    opacity: 0.7;
    border-radius: var(--radius-md);
    filter: saturate(0.8);
}

#imagenweona {
    animation: fadeInUp 0.6s 0.2s ease both;
}

#imagenweona .text-muted {
    margin-top: 12px;
    font-size: 0.85rem;
}

/* ============================
   FOOTER
   ============================ */
footer {
    margin-top: 80px;
    background: linear-gradient(135deg, var(--green-light) 0%, var(--green-primary) 100%);
    box-shadow: 0 -2px 20px rgba(74, 102, 80, 0.12);
}

footer .first_footer {
    display: flex;
    width: 100%;
    min-height: 140px;
    background: transparent;
    align-items: center;
}

footer section {
    display: flex;
    width: 50%;
    justify-content: center;
    align-items: center;
}

footer .left ul {
    font-size: 1rem;
    font-weight: 500;
    line-height: 2rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

footer .left ul a {
    color: var(--text-primary);
    font-weight: 500;
    transition: color var(--transition), transform var(--transition);
    display: inline-block;
}

footer .left ul a:hover {
    color: var(--green-darker);
    transform: translateX(4px);
}

footer p {
    margin: 0 !important;
    text-align: center;
    padding: 14px 12px;
    font-size: 0.8rem;
    color: var(--text-primary);
    background: rgba(0,0,0,0.06);
    font-weight: 500;
}

footer p a {
    color: var(--green-darker);
    font-weight: 600;
}

footer p a:hover {
    color: var(--text-primary);
}

/* ============================
   KEYFRAMES
   ============================ */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(18px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ============================
   RESPONSIVE
   ============================ */
@media (max-width: 576px) {
    .container-body {
        padding: 20px 12px;
        border-radius: var(--radius-md);
    }

    .title {
        font-size: 1.4rem;
    }

    .btn-calcular {
        font-size: 0.8rem;
        padding: 8px 16px;
    }

    footer .first_footer {
        flex-direction: column;
        height: auto;
        padding: 28px 0 12px;
        gap: 20px;
    }

    footer section {
        width: 100%;
    }
}